feat(t-paliad-265): caret + popover + chip on Verfahrensablauf cards

m/paliad#96 — frontend wiring of the per-event-card choice flow on
both consumer surfaces.

Shared rendering core (verfahrensablauf-core.ts):
- CalculatedDeadline gains choicesOffered + appellantContext (mirror
  the new server fields).
- deadlineCardHtml emits a ▾ caret next to the date when a rule
  carries a non-empty choicesOffered, plus an inert chip span next to
  the title that the popover module rehydrates after every render.
- bucketDeadlinesIntoColumns prefers appellantContext over the
  page-level appellant for "both" rows when the per-card context is
  set to claimant or defendant. "both" / "none" / "" all fall back to
  the existing collapse logic. New test cases cover all three paths.
- CalcParams + calculateDeadlines pass projectId / perCardChoices
  through to the backend.

New module (client/views/event-card-choices.ts):
- attachEventCardChoices wires a delegated click handler on the
  result container; the caret opens a body-anchored popover with one
  block per choice-kind the rule offers (appellant: 4 radio-style
  buttons; include_ccr + skip: 2-way toggle).
- Active picks render as small chips on the card title; reseedChips()
  repaints them after every renderResults() innerHTML rewrite.
- Skipped rows fade to 55% opacity via the timeline-item--skipped
  class.

Page wiring:
- /tools/verfahrensablauf (unbound): commits mutate an in-memory list
  + the ?event_choices= URL param, then schedule a recalc. Shareable
  via link, no persistence — same idiom as ?side= / ?appellant=.
- /tools/fristenrechner (project-bound): commits POST/DELETE to
  /api/projects/{id}/event-choices. The next calculate() call sends
  projectId so the server folds the persisted choices in.

i18n: 17 new keys under choices.* (DE primary + EN secondary). Caret
title, appellant/include_ccr/skip block titles + value labels, chip
labels, reset action, commit error toast.

CSS: caret, popover, options, chip parts, skipped-row fade.

Tests: 3 new bucketer cases covering AppellantContext propagation
(157 frontend tests pass).

cmd/server/main.go

@@ -218,6 +218,8 @@ func main() {
 			// is captured into __meta of every export and printed in the
 			// embedded README.
 			Export: services.NewExportService(pool, branding.Name),
+			// t-paliad-265 / m/paliad#96 — per-event-card optional choices.
+			EventChoice: services.NewEventChoiceService(pool, projectSvc, users),
 		}
 
 		// t-paliad-246 Slice A — Backup Mode runner. Wired only when

docs/design-event-card-choices-2026-05-25.md

@@ -0,0 +1,492 @@
+# Design — Per-event-card optional choices on the Verfahrensablauf timeline
+
+**Author:** atlas (inventor)
+**Date:** 2026-05-25
+**Task:** t-paliad-265 (m/paliad#96)
+**Branch:** `mai/atlas/inventor-per-event-card`
+**Status:** READY FOR REVIEW — m gates inventor → coder transition.
+
+---
+
+## 0. TL;DR
+
+> **m's decisions landed 2026-05-25** — see §11. Persisted table, caret+popover, per-card-overrides-page-level, and m chose to bundle Slice A + Slice B into one coder shift (over the inventor (R) of "Slice A first"). All other picks matched inventor recommendations.
+
+The Verfahrensablauf timeline today carries **two** projection knobs at the page level — `side` (who-we-are) and `appellant` (who-initiated). Both are **global** for the whole timeline. m wants three more knobs, but **per event card**, not page-level:
+
+1. **Appellant per decision card** — if a decision is appealable, the user picks which side appealed (Claimant / Defendant / Both / None). Different decisions in the same timeline can have different appellants.
+2. **Include Nichtigkeitswiderklage on Klageerwiderung** — toggling this on a single Klageerwiderung card flips on the existing `with_ccr` flag for everything downstream of that card.
+3. **Skip an optional event** — for any rule marked `priority='optional'`, a per-card "don't consider for this case" toggle hides downstream consequences.
+
+The flow these choices drive is **already there** — `condition_expr` jsonb gates (`with_ccr`, `with_amend`, `with_cci`) plus the page-level appellant selector. What's missing is (a) **per-card** scope and (b) **per-project persistence**.
+
+Recommendation: persist choices in a new `paliad.project_event_choices` table; expose them through a popover-on-caret affordance on the relevant cards only; map them into the existing `CalcOptions.Flags` + a new per-rule `Appellants` map at projection time. Two slices: **Slice A** (appellant-per-decision + skip-optional, narrow + bounded), **Slice B** (include-CCR-on-Klageerwiderung, requires per-card flag-scoping in the projection engine — bigger).
+
+---
+
+## 1. Premises verified live (before designing)
+
+CLAUDE.md / memory / issue text can drift; the live system can't. Each load-bearing premise below was probed against the live DB or live source on 2026-05-25.
+
+### Schema
+
+- **Migration tracker at 127** (`paliad.paliad_schema_migrations`). Next migration: 128. No new table for `project_event_choices` exists today.
+- **`paliad.deadline_rules` carries `condition_expr jsonb`** already. The flag-evaluation engine (`internal/services/fristenrechner.go:208 Calculate`, `evalConditionExpr` at line ~947) walks the jsonb tree and skips rules whose gate is unsatisfied. Today's gates are `{"flag":"with_ccr"}`, `{"flag":"with_amend"}`, `{"flag":"with_cci"}`, and `{"op":"and","args":[…]}` combinations.
+- **`with_ccr` is the existing Nichtigkeitswiderklage gate.** Verified live: 7 upc.inf.cfi rules gate on it (`upc.inf.cfi.reply`, `…rejoin`, `…ccr`, `…def_to_ccr`, `…reply_def_ccr`, `…rejoin_reply_ccr`, plus `upc.inf.cfi.app_to_amend` which additionally requires `with_amend`).
+- **`priority` column** has 4 values: `mandatory`, `recommended`, `optional`, `informational`. Live counts (deadline_rules table-wide): 230 mandatory / 18 recommended / 6 optional / (informational not in count, must be 0 or absent). The "skip optional" affordance keys off `priority='optional'`.
+- **`event_type` discriminator** exists with values `filing`, `decision`, `hearing`. The "appellant-per-decision" affordance keys off `event_type='decision'`. Live: every decision rule has `primary_party='court'`.
+- **`paliad.projects.our_side`** exists (column added before mig 112; values today include `claimant|defendant|applicant|appellant|respondent|third_party|other`). It is the broad project-level side axis t-paliad-257 / #88 hooked into.
+- **NO `appellant` column on `paliad.projects`** — the appellant axis lives only in the URL query (`?appellant=claimant|defendant`) in `client/verfahrensablauf.ts:73-89`.
+
+### Frontend
+
+- `frontend/src/client/views/verfahrensablauf-core.ts` is the **shared rendering core** for both `/tools/verfahrensablauf` and `/tools/fristenrechner`. Per-card UI affordances added here surface on both pages automatically.
+- `bucketDeadlinesIntoColumns(deadlines, {side, appellant})` (line 496) is the **pure routing primitive**; column placement is computed without DOM. Unit-tested in `verfahrensablauf-core.test.ts`.
+- `deadlineCardHtml(dl, {showParty, editable, showNotes})` (line 254) is the **per-card renderer**. There is no per-card props channel for "choices" yet — that's the surface this design extends.
+- `client/verfahrensablauf.ts` and `client/fristenrechner.ts` both manage `currentSide` + `currentAppellant` in-memory and round-trip them through the URL (`writeSideToURL` / `writeAppellantToURL`). The pattern is mature; this design mirrors it for the new state when state stays URL-bound, and lifts it into a server-persisted store when state stays per-project.
+- `APPELLANT_AXIS_PROCEEDINGS` set (verfahrensablauf.ts:52-62) gates the page-level appellant selector to appeal-flavoured proceedings only. The per-card appellant affordance MUST NOT depend on this set — any first-instance decision is a potential appeal trigger (e.g. LG-Urteil → Berufung, BPatG-Entscheidung → BGH-Rechtsbeschwerde).
+
+### Surfaces in scope
+
+- **`/tools/verfahrensablauf`** — abstract browse, no project context. Per-card choices here are ephemeral (URL-bound) — there's no project to persist into.
+- **`/tools/fristenrechner`** — concrete projection, optionally project-bound via `?project=<id>` (`currentStep1Context.kind === "project"`). When project-bound, per-card choices persist to `paliad.project_event_choices`. When unbound, URL only.
+- **`/projects/{id}` Verlauf tab (SmartTimeline)** — separate widget (per `docs/design-smart-timeline-2026-05-08.md`); does **NOT** use `renderColumnsBody`. Per-card choices are NOT in scope for the SmartTimeline in v1 — the Verfahrensablauf core is.
+
+### What is NOT premised
+
+- The deadline_rules → procedural_events rename (#93) is **not assumed shipped**. This design uses `deadline_rules`/`rule_code` vocabulary throughout and flags the rename touch-points in §6.
+- The per-card UI does NOT require new server-side priority/event_type semantics. Both `priority='optional'` and `event_type='decision'` exist on every row.
+
+---
+
+## 2. Vision + scope
+
+m's vision (verbatim 2026-05-25 15:12):
+
+> We still have no choice to say that a specific party appealed. We may need selections within the event cards on the timeline to change it? For example for a decision we could check Appeal by... or in Klageerwiderung we can chose to include a Nichtigkeitswiderklage. Or with any optional event we can select not to consider it (because someone decided not to file it).
+
+### What changes
+
+- A **caret affordance** (▾) appears on the right edge of cards that have at least one applicable choice-kind. Click → small popover with the choices. Cards without an applicable choice render unchanged.
+- A **`choices_offered` jsonb column** on `paliad.deadline_rules` declares which choice-kinds each rule offers. Three kinds in v1:
+  - `appellant` — applicable to rules with `event_type='decision'` (no static list; engine decides).
+  - `include_ccr` — applicable to the single Klageerwiderung rule per proceeding (today: `upc.inf.cfi.def`, `de.inf.lg.erwidg`).
+  - `skip` — applicable to any rule with `priority='optional'`.
+- A **new persistence table** `paliad.project_event_choices(project_id, rule_code, choice_kind, choice_value)` holds the user's choices. Per-project, audit-logged via `paliad.system_audit_log`.
+- A **projection-time merge** turns the persisted choices into `CalcOptions.Flags` and a new `PerCardAppellants map[ruleCode]string` field, then re-runs the existing projection engine. No new flag types; `with_ccr` is the same `with_ccr`.
+
+### What stays
+
+- `bucketDeadlinesIntoColumns` and `renderColumnsBody` are extended (new opts), not replaced.
+- `condition_expr` jsonb gating semantics are unchanged. Per-card `include_ccr` choice simply means "set `with_ccr` in the flag set for this projection" — same engine.
+- Page-level `side` / `appellant` selectors stay. The per-card appellant choice is an **override layer** on top of the page-level appellant (Q4 below).
+- URL-state plumbing (`?side=…`, `?appellant=…`) stays. The page-level URL params remain the only state for unbound `/tools/verfahrensablauf`.
+
+### Out of scope (v1)
+
+- Per-card choices on the SmartTimeline (project Verlauf tab). Deferred to a follow-up when SmartTimeline matures.
+- Versioning of choices over time ("the appellant changed mid-case", "the CCR was withdrawn"). Choices are last-write-wins.
+- Cross-project propagation of choices.
+- Implementing the choice flow (coder task per slice; this is design-only).
+- A "what-if scenarios" mode (saved named scenarios).
+
+---
+
+## 3. Data model
+
+### 3.1 The new table
+
+```sql
+-- migration 128_project_event_choices.up.sql
+CREATE TABLE paliad.project_event_choices (
+  id          uuid PRIMARY KEY DEFAULT gen_random_uuid(),
+  project_id  uuid NOT NULL REFERENCES paliad.projects(id) ON DELETE CASCADE,
+  rule_code   text NOT NULL,                       -- e.g. "RoP.029.a" or "de.inf.lg.urteil"
+  choice_kind text NOT NULL,                       -- 'appellant' | 'include_ccr' | 'skip'
+  choice_value text NOT NULL,                      -- value namespace per kind (see §3.3)
+  created_by  uuid REFERENCES paliad.users(id) ON DELETE SET NULL,
+  created_at  timestamptz NOT NULL DEFAULT now(),
+  updated_by  uuid REFERENCES paliad.users(id) ON DELETE SET NULL,
+  updated_at  timestamptz NOT NULL DEFAULT now(),
+
+  -- One choice per (project, rule_code, kind). Re-pick is an UPDATE.
+  UNIQUE (project_id, rule_code, choice_kind)
+);
+
+CREATE INDEX project_event_choices_project_idx
+  ON paliad.project_event_choices (project_id);
+
+-- RLS: same `paliad.can_see_project(project_id)` predicate as paliad.deadlines.
+ALTER TABLE paliad.project_event_choices ENABLE ROW LEVEL SECURITY;
+CREATE POLICY project_event_choices_select ON paliad.project_event_choices
+  FOR SELECT USING (paliad.can_see_project(project_id));
+CREATE POLICY project_event_choices_mutate ON paliad.project_event_choices
+  FOR ALL USING (paliad.can_see_project(project_id))
+  WITH CHECK (paliad.can_see_project(project_id));
+```
+
+**Why this shape:**
+- Tall not wide — adding a 4th choice-kind in slice C means one more allowed `choice_kind` value, no DDL.
+- `rule_code` is the join key against `paliad.deadline_rules` (which already uses `rule_code` widely — `Calculate`, `AnchorOverrides`, the projection). Stable across rule renames provided the rename keeps the same `rule_code`.
+- UNIQUE per `(project, rule_code, kind)` makes the choice idempotent — re-picking the appellant overwrites, doesn't accumulate.
+- ON DELETE CASCADE follows the project — when a project is hard-deleted (rare; usually soft-status), the choices go with it.
+
+### 3.2 The opt-in column on `paliad.deadline_rules`
+
+```sql
+-- migration 128_project_event_choices.up.sql (same migration)
+ALTER TABLE paliad.deadline_rules
+  ADD COLUMN choices_offered jsonb;
+
+-- Example seeded values (in the same migration's data-fix block):
+--
+--   upc.inf.cfi.def → '{"include_ccr": [true, false]}'
+--   de.inf.lg.erwidg → '{"include_ccr": [true, false]}'
+--   upc.inf.cfi.decision → '{"appellant": ["claimant", "defendant", "both", "none"]}'
+--   de.inf.lg.urteil → '{"appellant": ["claimant", "defendant", "both", "none"]}'
+--   (every event_type='decision' rule)
+--   upc.inf.cfi.ccr (priority='optional') → '{"skip": [true, false]}'
+--   (every priority='optional' rule)
+```
+
+**Alternative considered + rejected:** infer offering at projection-time from `(event_type, priority, submission_code)` heuristics. Rejected because:
+- The Klageerwiderung rule is identified only by its `submission_code` slug. Tying the engine to a hardcoded slug list inside the projection service is brittle (mig 124 + future Wave-1 fixes rename slugs); declaring `choices_offered` in data lets the audit ship them without a code change.
+- A `skip` toggle that's automatically derived from `priority='optional'` is consistent today but may diverge tomorrow (an optional rule we DON'T want skippable, or a non-optional rule we DO want skippable). The opt-in jsonb keeps the choice axis decoupled from `priority`.
+
+### 3.3 Value namespaces per kind
+
+| `choice_kind` | `choice_value` valid set | Default when no row exists |
+|---|---|---|
+| `appellant` | `"claimant"` / `"defendant"` / `"both"` / `"none"` | inherits page-level appellant (URL `?appellant=`), else `null` (treated as "not yet picked" — render appeal-deadlines greyed) |
+| `include_ccr` | `"true"` / `"false"` | `"false"` (no CCR until user opts in — matches current default flag set) |
+| `skip` | `"true"` / `"false"` | `"false"` (rule renders normally) |
+
+Values are stored as `text` not `boolean` so the same column scales to multi-valued kinds (appellant has 4 values; future kinds may have N). Coercion lives in the service layer.
+
+### 3.4 Audit trail
+
+Every INSERT / UPDATE / DELETE on `project_event_choices` writes a row to `paliad.system_audit_log` (the standard sink mig 102 introduced) with `event_type='project_event_choice.set'` and the changed `(rule_code, kind, value)` in `metadata jsonb`. Pattern mirrors `paliad.deadlines.status_changed` audit rows.
+
+---
+
+## 4. Projection flow
+
+The existing projection engine is a single Go function: `FristenrechnerService.Calculate(ctx, proceedingCode, triggerDateStr, opts CalcOptions)`. Two changes:
+
+### 4.1 Extending `CalcOptions`
+
+```go
+type CalcOptions struct {
+    // ...existing fields...
+    Flags           []string             // <-- already exists
+    AnchorOverrides map[string]string    // <-- already exists
+
+    // NEW — per-card overrides surfaced by the per-event-card choices.
+    // Keyed by deadline_rules.rule_code.
+    //
+    //   PerCardAppellant: when a decision rule's rule_code is in this map,
+    //     the appellant for downstream rules whose parent is THAT decision
+    //     is set to the value here. Overrides any global Appellant.
+    //
+    //   SkipRules: when a rule's rule_code is in this set, the rule is
+    //     suppressed AND its descendants are suppressed. Same suppression
+    //     path as a failed condition_expr gate.
+    //
+    //   IncludeCCRFor: when a rule's rule_code is in this set, the with_ccr
+    //     flag is treated as set in the flag context FROM that rule
+    //     onward (i.e. for that rule's descendants). On v1 with a single
+    //     Klageerwiderung-per-proceeding, this is equivalent to a project-
+    //     wide with_ccr — but the per-card scope leaves room for future
+    //     proceedings with multiple CCR entry points.
+    PerCardAppellant map[string]string   // rule_code → "claimant"|"defendant"|"both"|"none"
+    SkipRules        map[string]struct{} // set of rule_code
+    IncludeCCRFor    map[string]struct{} // set of rule_code
+}
+```
+
+The handler reads `project_event_choices` for the project (if project-bound) and folds them into these fields before calling `Calculate`. When called unbound (URL-only, `/tools/verfahrensablauf` without project), the maps come from URL params instead (see §5.2).
+
+### 4.2 Three engine changes
+
+1. **SkipRules suppression**: in the post-condition_expr filter pass (`Calculate` around line 333 where the gate is evaluated), additionally drop any rule whose `rule_code ∈ opts.SkipRules`. Also drop its descendants (existing `parent_id` walk already handles cascading; just add the new predicate to the keep/drop decision).
+
+2. **IncludeCCRFor scope**: rather than threading a per-rule flag context (expensive change to engine), implement v1 as: **if any rule_code in IncludeCCRFor exists at all, append `"with_ccr"` to `opts.Flags`** before the gate-evaluation pass. This is correct for the v1 surface (Klageerwiderung is the only CCR-entry-point per proceeding) but loses the per-card scoping for multi-CCR cases. The full per-rule scope is **Slice B** (§7).
+
+3. **PerCardAppellant routing**: when `bucketDeadlinesIntoColumns` collapses `party=both` rows in the appellant's column, today it consults the global `opts.appellant`. Extend to consult `PerCardAppellant[ruleCode]` first — if present, that drives the collapse for descendants of that decision. Out-of-band: this changes the projection contract subtly. We surface this as **server-computed metadata** on the response (`CalculatedDeadline.AppellantContext`) so the frontend bucketer doesn't need to know about parent-chain walks — the server already does the walk.
+
+### 4.3 Wire shape
+
+The `CalculatedDeadline` Go struct + TS mirror grow one optional field:
+
+```go
+type CalculatedDeadline struct {
+    // ...existing fields...
+    AppellantContext string `json:"appellantContext,omitempty"`
+    // "claimant" | "defendant" | "both" | "none" | "" (default).
+    // Filled by the projection from the user's per-decision choice.
+    // Frontend bucketer prefers this over the page-level appellant.
+}
+```
+
+This keeps the bucketer logic local — no second pass needed.
+
+---
+
+## 5. UI / i18n
+
+### 5.1 Caret + popover affordance
+
+Each rendered card gets, when `choices_offered IS NOT NULL`, a `▾` caret on the right edge of the title line. Click → popover anchored to the caret. Popover renders one block per choice-kind the rule offers (typically one, occasionally two if a rule has both `appellant` and `skip` — none today; design holds for the future).
+
+DOM-wise: `frontend/src/client/views/verfahrensablauf-core.ts` `deadlineCardHtml` grows a `choicesCaret` segment, and a sibling module `client/views/event-card-choices.ts` (new) owns the popover open/close + commit handler. The popover commits via `POST /api/projects/{id}/event-choices` with body `{rule_code, kind, value}`; the response is the updated choice row.
+
+**Why a popover and not inline checkboxes:**
+- Inline would put a checkbox on every decision card + every optional card. ~6 decision cards + ~6 optional cards on a typical UPC.INF.CFI projection is ~12 always-on widgets per timeline. Visual noise + scan cost.
+- Popover defaults to hidden; the caret is a low-noise affordance. The selected choice surfaces as a small chip on the card title line ("Berufung: Beklagter") so the choice is glanceable without re-opening.
+- Mobile + touch: the caret is a 24×24 tap target; the popover is keyboard-dismissable.
+
+**Why not card-hover-reveal:** discoverability + touch failure (no hover on iOS).
+
+### 5.2 URL fallback (no project context)
+
+When `/tools/verfahrensablauf` is opened without a project (the abstract-browse case), per-card choices have no persistence layer. The popover still works, but commits update an **in-memory + URL** state instead:
+
+```
+?event_choices=RoP.029.a:appellant=defendant,upc.inf.cfi.ccr:skip=true
+```
+
+Compact CSV in one URL param. Read at page load, applied to `CalcOptions` via the same `PerCardAppellant` / `SkipRules` / `IncludeCCRFor` route. Shareable, ephemeral. Matches the existing `?side=` + `?appellant=` URL idiom.
+
+### 5.3 Chip indicators
+
+A card with a non-default choice gets a small chip next to the title:
+- Appellant chosen: `Berufung: Beklagter` / `Appeal: Defendant`
+- Include CCR: `mit Nichtigkeitswiderklage` / `with CCR`
+- Skipped: card itself fades to 50% opacity, body adds class `timeline-item--skipped`, chip reads `übersprungen` / `skipped` with an undo arrow.
+
+### 5.4 i18n keys (new)
+
+```
+choices.caret.title              "Optionen für dieses Ereignis"             "Options for this event"
+choices.appellant.title          "Berufung durch ..."                       "Appealed by ..."
+choices.appellant.claimant       "Klägerseite"                              "Claimant side"
+choices.appellant.defendant      "Beklagtenseite"                           "Defendant side"
+choices.appellant.both           "beide Parteien"                           "both parties"
+choices.appellant.none           "keine Berufung"                           "no appeal"
+choices.include_ccr.title        "Nichtigkeitswiderklage einbeziehen"       "Include nullity counterclaim"
+choices.skip.title               "Für diese Akte überspringen"              "Skip for this case"
+choices.skipped.chip             "übersprungen"                             "skipped"
+choices.reset                    "Auswahl zurücksetzen"                     "Reset choice"
+```
+
+### 5.5 What's removed
+
+The page-level appellant selector (URL `?appellant=`) stays for **non-decision proceedings** (the Appeal-CoA case where the appellant axis is the whole-timeline framing, not a per-decision choice). But for first-instance proceedings (UPC.INF, DE.INF.LG, etc.), the appellant axis migrates from page-level to per-decision card. The page-level selector hides when the proceeding has decision rules with `choices_offered.appellant` declared — which is the cleaner UX (one knob, in the right place).
+
+---
+
+## 6. Services + handlers (new surface)
+
+### 6.1 Go service
+
+```go
+// internal/services/event_choice_service.go (new)
+type EventChoiceService struct {
+    db *sqlx.DB
+}
+
+func (s *EventChoiceService) ListForProject(ctx context.Context, projectID uuid.UUID) ([]ProjectEventChoice, error)
+func (s *EventChoiceService) Upsert(ctx context.Context, c ProjectEventChoice) error
+func (s *EventChoiceService) Delete(ctx context.Context, projectID uuid.UUID, ruleCode, kind string) error
+
+// Used by ProjectionService to fold choices into CalcOptions.
+func (s *EventChoiceService) ToCalcOptions(choices []ProjectEventChoice) CalcOptionsAddendum
+```
+
+The `CalcOptionsAddendum` type wraps the three new map/set fields so the merge into the parent `CalcOptions` is one call from the projection handler.
+
+### 6.2 HTTP routes
+
+```
+GET    /api/projects/{id}/event-choices              → []ProjectEventChoice
+PUT    /api/projects/{id}/event-choices              → upsert one (body: {rule_code, kind, value})
+DELETE /api/projects/{id}/event-choices/{rule_code}/{kind} → remove
+```
+
+All gated by `gateOnboarded` + visibilityPredicate (project-team membership).
+
+### 6.3 Projection handler
+
+The existing `POST /api/tools/fristenrechner` handler accepts `flags`, `anchorOverrides`, `priorityDate`, `courtId`. Extend the request shape:
+
+```json
+{
+  "proceedingType": "upc.inf.cfi",
+  "triggerDate": "2026-01-15",
+  "flags": ["with_ccr"],
+  "perCardChoices": [
+    {"rule_code": "RoP.029.a", "kind": "appellant", "value": "defendant"},
+    {"rule_code": "upc.inf.cfi.ccr", "kind": "skip", "value": "true"}
+  ]
+}
+```
+
+Or, when project-bound:
+
+```json
+{
+  "proceedingType": "upc.inf.cfi",
+  "triggerDate": "2026-01-15",
+  "projectId": "abc-123"
+  // server pulls perCardChoices from paliad.project_event_choices
+}
+```
+
+The handler merges either source into `CalcOptions` and runs `Calculate`.
+
+### 6.4 Touch points — files coder will edit
+
+- **DB**: new migration `128_project_event_choices.up.sql` + `.down.sql`. Add `choices_offered` column + seed data.
+- **Go**: `internal/services/event_choice_service.go` (new), `internal/services/fristenrechner.go` (extend `CalcOptions`, projection logic), `internal/handlers/event_choices.go` (new HTTP routes), `internal/handlers/fristenrechner.go` (request shape extension).
+- **Models**: `internal/models/models.go` — `ProjectEventChoice` struct, `CalculatedDeadline.AppellantContext` field.
+- **Frontend**: `frontend/src/client/views/verfahrensablauf-core.ts` (caret + chip in deadlineCardHtml), `frontend/src/client/views/event-card-choices.ts` (new popover module), `frontend/src/client/verfahrensablauf.ts` + `frontend/src/client/fristenrechner.ts` (URL-state plumbing for the unbound case; load project choices for the bound case).
+- **i18n**: `frontend/src/client/i18n.ts` + `frontend/src/i18n-keys.ts` — new keys per §5.4.
+- **Tests**: `internal/services/event_choice_service_test.go` (new), `internal/services/fristenrechner_test.go` (extend with PerCardAppellant + SkipRules cases), `frontend/src/client/views/verfahrensablauf-core.test.ts` (extend bucketing with `perCardAppellant` opt).
+
+### 6.5 Coordination with #93 procedural-events rename
+
+When #93 lands (and the rename ships), this design's `rule_code` references become `procedural_event.code` — same string namespace, cleaner name. Join points:
+- `project_event_choices.rule_code` → `project_event_choices.procedural_event_code` (or stays as a generic string column if #93 keeps `rule_code` as the join key).
+- `deadline_rules.choices_offered` → `procedural_events.choices_offered`.
+
+If #93 ships first, this design's migration applies to `procedural_events` instead. The data shape (jsonb + new join table) is unaffected. If THIS ships first, #93 absorbs the column in its rename.
+
+---
+
+## 7. Slice plan
+
+### Slice A — Appellant per decision + Skip optional event
+
+Two choice-kinds, narrow + bounded, do not change the gate-evaluation engine.
+
+- **DB**: migration 128 adds `project_event_choices` + `choices_offered`. Seed `choices_offered` on all `event_type='decision'` rules and all `priority='optional'` rules.
+- **Service**: `EventChoiceService` CRUD; `CalcOptions.PerCardAppellant` + `CalcOptions.SkipRules`; `Calculate` extension to honour SkipRules suppression + AppellantContext metadata.
+- **HTTP**: 3 new routes (GET / PUT / DELETE on project_event_choices); fristenrechner request extension.
+- **Frontend**: caret + popover on decision cards + optional cards; chip indicators; URL-state for the unbound case; load-on-mount for the bound case.
+- **Tests**: bucketing with PerCardAppellant; service CRUD; gate-suppression with SkipRules.
+
+Ship this slice first. It validates the popover affordance + the persistence layer end-to-end without touching the flag-evaluation engine.
+
+### Slice B — Include Nichtigkeitswiderklage on Klageerwiderung
+
+Wires `IncludeCCRFor` through the flag-evaluation engine. v1 simplification (§4.2 #2) makes this **almost** a no-op for the engine — but the per-card scope semantics need a separate inventor pass to nail down whether the simplification holds for de.inf.lg's CCR analogue (Widerklage auf Nichtigkeit) and for any future proceedings with multiple CCR entry points.
+
+- **DB**: add `include_ccr` to allowed `choice_kind` values + seed `choices_offered = '{"include_ccr": [true, false]}'` on the Klageerwiderung rows (`upc.inf.cfi.def`, `de.inf.lg.erwidg`).
+- **Service**: `CalcOptions.IncludeCCRFor`; the "if non-empty, append with_ccr to Flags" simplification.
+- **Frontend**: the include_ccr popover block (already designed; just enabling the row).
+- **Cross-flow audit**: confirm that the existing 7 upc.inf.cfi cross-flow rules + de.inf.lg analogues fire correctly when with_ccr is set via the per-card path vs. the existing page-level flag checkbox. Existing checkbox stays in v1; deprecation is a Slice C decision.
+
+### Bundling note (per m's Q4 decision 2026-05-25)
+
+A + B ship together. The slice headings above remain as a logical breakdown for the coder to follow when sequencing commits inside the single shift; they are not separate PRs. See §11 Q4 for rationale.
+
+### Slice C — Future choice-kinds
+
+Open-ended; not designed here. Examples surfaced by the t-paliad-067 audit:
+- "Bilateral hearing requested" toggle on hearing rules.
+- "Cost orders requested" toggle on cost-related rules.
+- "Stay applied" toggle on procedural events.
+
+Each new kind = one new allowed `choice_kind` value + one seed row + one popover block. Schema-stable.
+
+---
+
+## 8. Risk assessment
+
+- **Migration risk**: new table + new column, both additive. Down-migration drops table + column + reverts seed. No data loss path. Low risk.
+- **Projection correctness**: PerCardAppellant changes the bucket routing for "both" rows in chains downstream of a decision card. The unit-tested `bucketDeadlinesIntoColumns` carries the existing appellant semantics; extending it without breaking the existing test suite means new tests, not changes to existing ones. Coder MUST add the new tests before changing the bucketer.
+- **Flag-context vs per-rule-flag aliasing**: §4.2 #2 (Slice B) trades per-card precision for engine simplicity. Acceptable in v1 (Klageerwiderung is the only entry point per proceeding) but a known limitation. Document it in `internal/services/fristenrechner.go` doc comment so the next Wave-2 inventor doesn't think it's bug-free.
+- **Page-level vs per-card appellant interaction**: when both are set, per-card wins for descendants of the decision the per-card was set on; page-level still drives descendants of decisions without a per-card pick. Could confuse a user. Mitigation: the page-level appellant selector hides for first-instance proceedings (per §5.5). For appeal proceedings, the selector stays — but those proceedings have a single root decision so the conflict surface is small.
+- **Cross-proceeding consistency** (where #93's rename lives) — coordinate with the inventor on #93 if both ship in parallel.
+
+---
+
+## 9. Out of scope (recap)
+
+- SmartTimeline (project Verlauf tab) per-card choices.
+- Versioning / time-machine of choices.
+- Cross-project propagation.
+- Coder implementation (separate task per slice).
+- A "saved scenarios" feature.
+- Removal of the page-level `?appellant=` URL param for appeal proceedings.
+
+---
+
+## 10. Open questions for m
+
+The following 4 questions need m's pick. Inventor recommendations marked **(R)**. After m answers via AskUserQuestion, the picks land in §11 below as the historical record.
+
+### Q1 — State location
+
+Where do per-card choices live?
+
+- **(R) A. `paliad.project_event_choices` persisted (with URL override for what-if).** Per-case choices are real, not exploratory. Persist by default; what-if exploration handled later as a URL-override layer.
+- B. URL query state only. Ephemeral, shareable, no persistence.
+- C. Both from day one. Persisted default + URL-overridable for what-if scenarios.
+
+### Q2 — Affordance
+
+How do the choices surface on a card?
+
+- **(R) A. Caret (▾) + popover on click.** Off-by-default visual, on-tap reveal. Selected choice surfaces as a chip on the card title.
+- B. Inline checkbox/radio on every relevant card. Higher discoverability, more visual noise.
+- C. Card-hover reveals the choices. Discoverability + touch issues.
+
+### Q3 — Page-level appellant interaction
+
+When a per-card appellant is set on a decision, what happens to the page-level `?appellant=` selector?
+
+- **(R) A. Per-card overrides page-level for descendants of THAT decision.** Decisions without a per-card pick still use page-level. Most expressive.
+- B. Per-card inherits page-level unless explicitly set. Less surprising default but loses the per-decision expressiveness.
+
+### Q4 — Slice order
+
+Which slice ships first?
+
+- **(R) A. Slice A first (appellant per decision + skip optional).** Bounded, validates the popover + persistence layer without touching the flag-evaluation engine. Slice B (include-CCR) follows.
+- B. Slice B first. Higher-impact user feature but requires the engine change.
+- C. Bundle A + B in one coder shift. Slower to ship, lower per-coder load, but one less round trip.
+
+---
+
+## 11. m's decisions (2026-05-25)
+
+- **Q1 (State location):** Persisted table — `paliad.project_event_choices` per §3.1. Matches inventor (R).
+- **Q2 (Affordance):** Caret + popover with chip indicator on chosen cards per §5.1, §5.3. Matches inventor (R).
+- **Q3 (Appellant layer):** Per-card overrides page-level for descendants of that decision. Page-level still drives decisions without a per-card pick. Matches inventor (R). Implementation: `CalculatedDeadline.AppellantContext` (§4.3) carries the per-decision pick down the parent chain so the bucketer reads one field.
+- **Q4 (Slice order):** **Bundle Slice A + Slice B in one coder shift** (m picked over inventor (R) of "A first"). Reasoning: keeps the popover, persistence layer, AND the engine extension for `IncludeCCRFor` in one cohesive PR — coder + reviewer hold the full mental model once; one user-visible release; no half-shipped state where the caret exists on Klageerwiderung cards but the include-CCR pick doesn't yet wire through. Trade-off: larger PR. Mitigation: coder still organises commits per slice internally (separate test files, separate handler additions) so review can read them sequentially. See §7 slice plan — both slices implemented; ship as one.
+
+### Coder-shift implications of Q4 bundling
+
+- Migration 128 carries ALL three choice-kinds (`appellant`, `skip`, `include_ccr`) in the seed of `choices_offered`, plus the Klageerwiderung rows seeded with `{"include_ccr": [true, false]}`.
+- `CalcOptions` gains all three new fields (`PerCardAppellant`, `SkipRules`, `IncludeCCRFor`) in the same Go change.
+- The `IncludeCCRFor` v1 simplification (§4.2 #2 — "any non-empty set means append `with_ccr` to Flags") documents the per-card-scope limitation up front. Multi-CCR proceedings are a future expansion, not a v1 ship blocker.
+- Frontend popover renders all three blocks the rule offers in one render path; coder cannot half-ship by leaving include_ccr's popover branch as a TODO.
+- Tests cover the full matrix on the same branch.
+
+---
+
+## 12. Hard rules for the coder shift
+
+- Migration is 128, not anything else. Verify against `paliad.paliad_schema_migrations` MAX before authoring.
+- Tests added BEFORE projection-engine changes in fristenrechner.go (bucketer, gate, AppellantContext).
+- `go build ./... && go test ./internal/... && cd frontend && bun run build` clean.
+- No regression on `?side=` + `?appellant=` URL state.
+- DE primary, EN secondary for all new i18n keys.
+- Branch per slice: `mai/<coder>/event-card-choices-slice-a` etc.
+
+---
+
+## 13. Reporting
+
+When ready, the coder reports completion with the URL of the test project that exercises the feature, a screenshot of the popover, and the deadline-rules SQL UPDATE counts for the seeded `choices_offered` rows. Standard slice-completion shape.

frontend/src/client/fristenrechner.ts

@@ -24,6 +24,12 @@ import {
   renderTimelineBody,
   wireDateEditClicks,
 } from "./views/verfahrensablauf-core";
+import {
+  attachEventCardChoices,
+  reseedChips,
+  type EventChoice,
+  type ChoiceKind,
+} from "./views/event-card-choices";
 
 let lastResponse: DeadlineResponse | null = null;
 
@@ -162,6 +168,13 @@ async function calculate() {
     ? courtPicker.value
     : "";
 
+  // t-paliad-265 — when project-bound, the server pulls per-card
+  // choices from paliad.project_event_choices. The frontend has
+  // already pre-fetched them into perCardChoicesCache so chip
+  // indicators repaint in step with the calc; sending projectId here
+  // is the persistence path.
+  const projectIdForCalc = currentStep1Context.kind === "project" ? currentStep1Context.projectId : "";
+
   const data = await calculateDeadlines({
     proceedingType: selectedType,
     triggerDate,
@@ -169,6 +182,7 @@ async function calculate() {
     flags,
     anchorOverrides: overrides,
     courtId,
+    projectId: projectIdForCalc || undefined,
   });
   if (seq !== procCalcSeq) return;
   if (!data) return;
@@ -439,6 +453,10 @@ function renderProcedureResults(data: DeadlineResponse) {
     : renderTimelineBody(data, { showParty: true, editable: true, showNotes });
 
   container.innerHTML = headerHtml + bodyHtml;
+  // t-paliad-265: rehydrate per-event-card chip indicators after the
+  // innerHTML rewrite. Safe to call before attachEventCardChoices() —
+  // it no-ops when no state was attached yet.
+  reseedChips(container);
   printBtn.style.display = "block";
   if (saveBtn) {
     // Ad-hoc explore-mode has no project to save against — show the
@@ -461,6 +479,49 @@ function renderProcedureResults(data: DeadlineResponse) {
   applyPendingFocus();
 }
 
+// initEventCardChoicesForFristenrechner attaches the per-event-card
+// popover to the timeline container. The fristenrechner page is the
+// project-bound surface: commits POST/DELETE to the persistence
+// endpoint; the next calculate() pulls the fresh state from the
+// server. (t-paliad-265)
+async function initEventCardChoicesForFristenrechner(container: HTMLElement): Promise<void> {
+  // Load the current persisted state for the project context, if any.
+  const initial: EventChoice[] = [];
+  if (currentStep1Context.kind === "project" && currentStep1Context.projectId) {
+    try {
+      const resp = await fetch(`/api/projects/${encodeURIComponent(currentStep1Context.projectId)}/event-choices`);
+      if (resp.ok) {
+        const rows = (await resp.json()) as EventChoice[];
+        for (const r of rows) initial.push(r);
+      }
+    } catch (e) {
+      console.error("event-choices: initial load failed", e);
+    }
+  }
+
+  attachEventCardChoices({
+    container,
+    initial,
+    commit: async (choice) => {
+      if (currentStep1Context.kind !== "project" || !currentStep1Context.projectId) return;
+      const resp = await fetch(`/api/projects/${encodeURIComponent(currentStep1Context.projectId)}/event-choices`, {
+        method: "PUT",
+        headers: { "Content-Type": "application/json" },
+        body: JSON.stringify(choice),
+      });
+      if (!resp.ok) throw new Error(`event-choices PUT ${resp.status}`);
+      scheduleProcCalc(0);
+    },
+    remove: async (submissionCode, kind) => {
+      if (currentStep1Context.kind !== "project" || !currentStep1Context.projectId) return;
+      const url = `/api/projects/${encodeURIComponent(currentStep1Context.projectId)}/event-choices/${encodeURIComponent(submissionCode)}/${encodeURIComponent(kind)}`;
+      const resp = await fetch(url, { method: "DELETE" });
+      if (!resp.ok && resp.status !== 404) throw new Error(`event-choices DELETE ${resp.status}`);
+      scheduleProcCalc(0);
+    },
+  });
+}
+
 // onDateEditCommit is the click-to-edit callback handed to the shared
 // wireDateEditClicks() helper: persist the per-rule override (empty value
 // clears it) then recompute so downstream rules re-anchor.
@@ -648,6 +709,15 @@ document.addEventListener("DOMContentLoaded", () => {
   const timelineContainer = document.getElementById("timeline-container");
   if (timelineContainer) wireDateEditClicks(timelineContainer, onDateEditCommit);
 
+  // t-paliad-265 — per-event-card choices. Project-bound surface, so
+  // commits POST to /api/projects/{id}/event-choices. The popover
+  // module owns the popover; this page owns the recalc trigger. When
+  // there's no project context yet (Step 1 not picked), the popover
+  // still works but commits silently no-op (project_id missing).
+  if (timelineContainer) {
+    void initEventCardChoicesForFristenrechner(timelineContainer);
+  }
+
   // Reset button
   document.getElementById("reset-btn")!.addEventListener("click", reset);
 

frontend/src/client/i18n.ts

@@ -306,6 +306,24 @@ const translations: Record<Lang, Record<string, string>> = {
     "deadlines.col.court": "Gericht",
     "deadlines.col.opponent": "Gegnerseite",
     "deadlines.col.both": "Beide Parteien",
+    // t-paliad-265 — per-event-card choice popover (Verfahrensablauf timeline)
+    "choices.caret.title": "Optionen für dieses Ereignis",
+    "choices.appellant.title": "Berufung durch …",
+    "choices.appellant.claimant": "Klägerseite",
+    "choices.appellant.defendant": "Beklagtenseite",
+    "choices.appellant.both": "beide Parteien",
+    "choices.appellant.none": "keine Berufung",
+    "choices.include_ccr.title": "Nichtigkeitswiderklage einbeziehen",
+    "choices.include_ccr.true": "Ja",
+    "choices.include_ccr.false": "Nein",
+    "choices.skip.title": "Für diese Akte überspringen",
+    "choices.skip.true": "Überspringen",
+    "choices.skip.false": "Einbeziehen",
+    "choices.skipped.chip": "übersprungen",
+    "choices.appellant.chip": "Berufung:",
+    "choices.include_ccr.chip": "mit Nichtigkeitswiderklage",
+    "choices.reset": "Auswahl zurücksetzen",
+    "choices.commit.error": "Konnte Auswahl nicht speichern",
     // Trigger-event mode (PR-2 \u2014 youpc-parity)
     "deadlines.mode.procedure": "Verfahrensablauf",
     "deadlines.mode.event": "Was kommt nach\u2026",
@@ -3373,6 +3391,24 @@ const translations: Record<Lang, Record<string, string>> = {
     "deadlines.col.court": "Court",
     "deadlines.col.opponent": "Opponent Side",
     "deadlines.col.both": "Both parties",
+    // t-paliad-265 — per-event-card choice popover (Verfahrensablauf timeline)
+    "choices.caret.title": "Options for this event",
+    "choices.appellant.title": "Appeal by …",
+    "choices.appellant.claimant": "Claimant side",
+    "choices.appellant.defendant": "Defendant side",
+    "choices.appellant.both": "both parties",
+    "choices.appellant.none": "no appeal",
+    "choices.include_ccr.title": "Include nullity counterclaim",
+    "choices.include_ccr.true": "Yes",
+    "choices.include_ccr.false": "No",
+    "choices.skip.title": "Skip for this case",
+    "choices.skip.true": "Skip",
+    "choices.skip.false": "Include",
+    "choices.skipped.chip": "skipped",
+    "choices.appellant.chip": "Appeal:",
+    "choices.include_ccr.chip": "with nullity counterclaim",
+    "choices.reset": "Reset choice",
+    "choices.commit.error": "Could not save selection",
     "deadlines.adjusted": "Adjusted",
     "deadlines.adjusted.reason": "weekend/holiday",
     "deadlines.adjusted.weekend": "weekend",

frontend/src/client/verfahrensablauf.ts

@@ -21,6 +21,13 @@ import {
   renderTimelineBody,
   wireDateEditClicks,
 } from "./views/verfahrensablauf-core";
+import {
+  attachEventCardChoices,
+  reseedChips,
+  currentChoices,
+  type EventChoice,
+  type ChoiceKind,
+} from "./views/event-card-choices";
 
 let selectedType = "";
 let lastResponse: DeadlineResponse | null = null;
@@ -98,6 +105,37 @@ function writeAppellantToURL(a: Side) {
 const anchorOverrides = new Map<string, string>();
 function clearAnchorOverrides() { anchorOverrides.clear(); }
 
+// Per-event-card choices (t-paliad-265). Unbound on this page (no
+// project context), so persistence is URL-only via `?event_choices=`.
+// Format: comma-separated `submission_code:kind=value` tuples. Same
+// idiom as `?side=` + `?appellant=`.
+let perCardChoices: EventChoice[] = [];
+
+function readChoicesFromURL(): EventChoice[] {
+  const raw = new URLSearchParams(window.location.search).get("event_choices");
+  if (!raw) return [];
+  const out: EventChoice[] = [];
+  for (const tuple of raw.split(",")) {
+    const m = tuple.match(/^([^:]+):([^=]+)=(.+)$/);
+    if (!m) continue;
+    const kind = m[2] as ChoiceKind;
+    if (kind !== "appellant" && kind !== "include_ccr" && kind !== "skip") continue;
+    out.push({ submission_code: m[1], choice_kind: kind, choice_value: m[3] });
+  }
+  return out;
+}
+
+function writeChoicesToURL(choices: EventChoice[]) {
+  const url = new URL(window.location.href);
+  if (choices.length === 0) {
+    url.searchParams.delete("event_choices");
+  } else {
+    const enc = choices.map((c) => `${c.submission_code}:${c.choice_kind}=${c.choice_value}`).join(",");
+    url.searchParams.set("event_choices", enc);
+  }
+  window.history.replaceState(null, "", url.pathname + (url.search ? url.search : "") + url.hash);
+}
+
 type ProcedureView = "timeline" | "columns";
 let procedureView: ProcedureView = "columns";
 
@@ -210,6 +248,7 @@ async function doCalc() {
     flags: readFlags(),
     anchorOverrides: overrides,
     courtId,
+    perCardChoices,
   });
   if (seq !== calcSeq) return;
   if (!data) return;
@@ -302,6 +341,11 @@ function renderResults(data: DeadlineResponse) {
   if (toggle) toggle.style.display = "";
 
   syncTriggerEventLabel();
+
+  // t-paliad-265: rehydrate per-event-card chip indicators after every
+  // re-render so the popover-driven active state survives the
+  // innerHTML rewrite the timeline body just did.
+  reseedChips(container);
 }
 
 function setProceedingPickerCollapsed(collapsed: boolean, displayName?: string) {
@@ -529,6 +573,34 @@ document.addEventListener("DOMContentLoaded", () => {
   initViewToggle();
   initPerspectiveControls();
 
+  // t-paliad-265 — per-event-card choices. Unbound surface, so commits
+  // mutate the in-memory list + URL, then trigger a recalc. The
+  // popover module owns the popover lifecycle; this page owns the
+  // recalc + URL plumbing.
+  perCardChoices = readChoicesFromURL();
+  const timelineEl = document.getElementById("timeline-container");
+  if (timelineEl) {
+    attachEventCardChoices({
+      container: timelineEl,
+      initial: perCardChoices,
+      commit: (choice) => {
+        perCardChoices = perCardChoices.filter(
+          (c) => !(c.submission_code === choice.submission_code && c.choice_kind === choice.choice_kind),
+        );
+        perCardChoices.push(choice);
+        writeChoicesToURL(perCardChoices);
+        scheduleCalc(0);
+      },
+      remove: (submissionCode, kind) => {
+        perCardChoices = perCardChoices.filter(
+          (c) => !(c.submission_code === submissionCode && c.choice_kind === kind),
+        );
+        writeChoicesToURL(perCardChoices);
+        scheduleCalc(0);
+      },
+    });
+  }
+
   onLangChange(() => {
     // Active-button name updates with language change (the data-i18n
     // pass swaps the inner <strong>'s text). Re-collapse the summary

frontend/src/client/views/event-card-choices.ts

@@ -0,0 +1,292 @@
+// Per-event-card choice popover + chip indicator (t-paliad-265 /
+// m/paliad#96).
+//
+// The shared rendering core (verfahrensablauf-core.ts) emits a caret
+// button on cards that carry a non-empty `choices_offered` declaration
+// and an inert chip span next to the title. This module:
+//
+//   1. Wires a delegated click handler on the result container so the
+//      caret opens a popover with the offered choice-kinds.
+//   2. Commits the user's pick — either by POSTing to the project-
+//      bound endpoint or by mutating the in-memory state for the
+//      unbound (no-project) case.
+//   3. Rehydrates the chip on every render + after every commit so the
+//      glanceable indicator matches the active state.
+//
+// Two consumer pages — /tools/verfahrensablauf (unbound) and
+// /tools/fristenrechner (project-bound) — both wire this module
+// once at boot via attachEventCardChoices().
+
+import { escAttr, escHtml } from "./verfahrensablauf-core";
+import { t } from "../i18n";
+
+export type ChoiceKind = "appellant" | "include_ccr" | "skip";
+
+export interface EventChoice {
+  submission_code: string;
+  choice_kind: ChoiceKind;
+  choice_value: string;
+}
+
+// State surface — the page passes in callbacks that own persistence.
+// commit / remove must trigger a recalc on the page side (the popover
+// only owns its own visual state).
+export interface EventCardChoicesOpts {
+  container: HTMLElement;
+  // Initial state: a list of choices. The page seeds this from the
+  // server response (project-bound) or from URL params (unbound).
+  initial: EventChoice[];
+  // commit gets called for an UPSERT. The page POSTs to the API (or
+  // mutates URL state) AND triggers a recalc.
+  commit: (choice: EventChoice) => Promise<void> | void;
+  // remove gets called when the user resets a choice.
+  remove: (submissionCode: string, kind: ChoiceKind) => Promise<void> | void;
+}
+
+// One mutable bag per attach() call. The current implementation is a
+// single-page singleton — paginated views (admin tables) are not in
+// scope. Last-write-wins on the in-memory state.
+interface AttachedState {
+  opts: EventCardChoicesOpts;
+  // active: submission_code → kind → value. Rebuilt from `initial`
+  // on every reseed() call.
+  active: Map<string, Map<ChoiceKind, string>>;
+  popover: HTMLDivElement | null;
+}
+
+const states = new WeakMap<HTMLElement, AttachedState>();
+
+// attachEventCardChoices wires the delegated click + popover lifecycle
+// to the given container. Call once per page after mount; safe to call
+// again with a fresh container.
+export function attachEventCardChoices(opts: EventCardChoicesOpts): void {
+  const state: AttachedState = {
+    opts,
+    active: new Map(),
+    popover: null,
+  };
+  for (const c of opts.initial) {
+    if (!state.active.has(c.submission_code)) {
+      state.active.set(c.submission_code, new Map());
+    }
+    state.active.get(c.submission_code)!.set(c.choice_kind, c.choice_value);
+  }
+  states.set(opts.container, state);
+
+  opts.container.addEventListener("click", (e) => {
+    const target = (e.target as HTMLElement | null)?.closest<HTMLElement>(".event-card-choices-caret");
+    if (target) {
+      e.stopPropagation();
+      openPopover(state, target);
+      return;
+    }
+    // Outside-click closes the popover.
+    if (state.popover && !state.popover.contains(e.target as Node)) {
+      closePopover(state);
+    }
+  });
+
+  // ESC also closes.
+  document.addEventListener("keydown", (e) => {
+    if (e.key === "Escape" && state.popover) {
+      closePopover(state);
+    }
+  });
+
+  // Repaint chips on every renderResults() call. The page is
+  // responsible for calling reseedChips() after re-render so the chip
+  // dom node (re-created by the renderer) picks the active state up.
+  reseedChips(opts.container);
+}
+
+// reseedChips walks every chip span in the container and re-renders
+// its content from the active state map. Idempotent.
+export function reseedChips(container: HTMLElement): void {
+  const state = states.get(container);
+  if (!state) return;
+  container.querySelectorAll<HTMLElement>(".event-card-choices-chip").forEach((chip) => {
+    const code = chip.dataset.submissionCode || "";
+    const kinds = state.active.get(code);
+    if (!kinds || kinds.size === 0) {
+      chip.innerHTML = "";
+      chip.dataset.empty = "true";
+      return;
+    }
+    chip.dataset.empty = "false";
+    chip.innerHTML = renderChip(kinds);
+  });
+  // Skipped rows fade out via a class on the card-item ancestor.
+  container.querySelectorAll<HTMLElement>(".event-card-choices-chip").forEach((chip) => {
+    const code = chip.dataset.submissionCode || "";
+    const skipped = state.active.get(code)?.get("skip") === "true";
+    const itemEl = chip.closest<HTMLElement>(".timeline-item, .fr-col-item");
+    if (itemEl) itemEl.classList.toggle("timeline-item--skipped", skipped);
+  });
+}
+
+function renderChip(kinds: Map<ChoiceKind, string>): string {
+  const parts: string[] = [];
+  if (kinds.get("skip") === "true") {
+    parts.push(`<span class="event-card-choices-chip-part event-card-choices-chip-part--skipped">${escHtml(t("choices.skipped.chip"))}</span>`);
+  }
+  const ap = kinds.get("appellant");
+  if (ap && ap !== "" ) {
+    let label = "";
+    switch (ap) {
+      case "claimant":  label = t("choices.appellant.claimant"); break;
+      case "defendant": label = t("choices.appellant.defendant"); break;
+      case "both":      label = t("choices.appellant.both"); break;
+      case "none":      label = t("choices.appellant.none"); break;
+    }
+    if (label) {
+      parts.push(`<span class="event-card-choices-chip-part">${escHtml(t("choices.appellant.chip"))} ${escHtml(label)}</span>`);
+    }
+  }
+  if (kinds.get("include_ccr") === "true") {
+    parts.push(`<span class="event-card-choices-chip-part">${escHtml(t("choices.include_ccr.chip"))}</span>`);
+  }
+  return parts.join(" ");
+}
+
+function openPopover(state: AttachedState, caret: HTMLElement): void {
+  closePopover(state);
+  const code = caret.dataset.submissionCode || "";
+  if (!code) return;
+  let offered: Record<string, unknown> = {};
+  try {
+    offered = JSON.parse(caret.dataset.choicesOffered || "{}");
+  } catch {
+    return;
+  }
+
+  const pop = document.createElement("div");
+  pop.className = "event-card-choices-popover";
+  pop.setAttribute("role", "dialog");
+  pop.setAttribute("aria-label", t("choices.caret.title"));
+
+  const blocks: string[] = [];
+  if (Array.isArray(offered.appellant)) {
+    blocks.push(renderAppellantBlock(state, code, offered.appellant as unknown[]));
+  }
+  if (Array.isArray(offered.include_ccr)) {
+    blocks.push(renderToggleBlock(state, code, "include_ccr"));
+  }
+  if (Array.isArray(offered.skip)) {
+    blocks.push(renderToggleBlock(state, code, "skip"));
+  }
+  pop.innerHTML = blocks.join("");
+
+  document.body.appendChild(pop);
+  state.popover = pop;
+  positionPopover(pop, caret);
+
+  pop.addEventListener("click", async (e) => {
+    const btn = (e.target as HTMLElement | null)?.closest<HTMLButtonElement>("button[data-choice-action]");
+    if (!btn) return;
+    e.stopPropagation();
+    const kind = btn.dataset.choiceKind as ChoiceKind | undefined;
+    const value = btn.dataset.choiceValue || "";
+    const action = btn.dataset.choiceAction;
+    if (!kind) return;
+    try {
+      if (action === "set") {
+        await state.opts.commit({ submission_code: code, choice_kind: kind, choice_value: value });
+        if (!state.active.has(code)) state.active.set(code, new Map());
+        state.active.get(code)!.set(kind, value);
+      } else if (action === "clear") {
+        await state.opts.remove(code, kind);
+        state.active.get(code)?.delete(kind);
+      }
+      reseedChips(state.opts.container);
+      closePopover(state);
+    } catch (err) {
+      console.error("event card choice commit failed", err);
+      // Surface a soft inline error inside the popover; do NOT close.
+      const errEl = document.createElement("div");
+      errEl.className = "event-card-choices-error";
+      errEl.textContent = t("choices.commit.error");
+      pop.appendChild(errEl);
+    }
+  });
+}
+
+function renderAppellantBlock(state: AttachedState, code: string, values: unknown[]): string {
+  const current = state.active.get(code)?.get("appellant") || "";
+  const buttons = values
+    .filter((v): v is string => typeof v === "string")
+    .map((v) => {
+      const labelKey = `choices.appellant.${v}` as const;
+      const isActive = v === current;
+      return `<button type="button"
+        data-choice-action="set"
+        data-choice-kind="appellant"
+        data-choice-value="${escAttr(v)}"
+        class="event-card-choices-option${isActive ? " event-card-choices-option--active" : ""}">${escHtml(t(labelKey as any))}</button>`;
+    })
+    .join("");
+  const reset = current
+    ? `<button type="button" data-choice-action="clear" data-choice-kind="appellant"
+        class="event-card-choices-reset">${escHtml(t("choices.reset"))}</button>`
+    : "";
+  return `<div class="event-card-choices-block">
+    <div class="event-card-choices-title">${escHtml(t("choices.appellant.title"))}</div>
+    <div class="event-card-choices-options">${buttons}</div>
+    ${reset}
+  </div>`;
+}
+
+function renderToggleBlock(state: AttachedState, code: string, kind: "include_ccr" | "skip"): string {
+  const current = state.active.get(code)?.get(kind) || "false";
+  const titleKey = kind === "include_ccr" ? "choices.include_ccr.title" : "choices.skip.title";
+  const trueKey = kind === "include_ccr" ? "choices.include_ccr.true" : "choices.skip.true";
+  const falseKey = kind === "include_ccr" ? "choices.include_ccr.false" : "choices.skip.false";
+  const opt = (v: "true" | "false", labelKey: string) => `<button type="button"
+    data-choice-action="set"
+    data-choice-kind="${kind}"
+    data-choice-value="${v}"
+    class="event-card-choices-option${v === current ? " event-card-choices-option--active" : ""}">${escHtml(t(labelKey as any))}</button>`;
+  const reset = state.active.get(code)?.has(kind)
+    ? `<button type="button" data-choice-action="clear" data-choice-kind="${kind}"
+        class="event-card-choices-reset">${escHtml(t("choices.reset"))}</button>`
+    : "";
+  return `<div class="event-card-choices-block">
+    <div class="event-card-choices-title">${escHtml(t(titleKey as any))}</div>
+    <div class="event-card-choices-options">
+      ${opt("true", trueKey)}
+      ${opt("false", falseKey)}
+    </div>
+    ${reset}
+  </div>`;
+}
+
+function closePopover(state: AttachedState): void {
+  if (state.popover) {
+    state.popover.remove();
+    state.popover = null;
+  }
+}
+
+function positionPopover(pop: HTMLDivElement, caret: HTMLElement): void {
+  const rect = caret.getBoundingClientRect();
+  const scrollY = window.scrollY || document.documentElement.scrollTop;
+  const scrollX = window.scrollX || document.documentElement.scrollLeft;
+  pop.style.position = "absolute";
+  pop.style.top = `${rect.bottom + scrollY + 4}px`;
+  pop.style.left = `${Math.max(8, rect.right + scrollX - 240)}px`;
+  pop.style.zIndex = "1000";
+}
+
+// Returns the current in-memory choice list for the given container —
+// used by the unbound /tools/verfahrensablauf page to keep the URL
+// param in sync.
+export function currentChoices(container: HTMLElement): EventChoice[] {
+  const state = states.get(container);
+  if (!state) return [];
+  const out: EventChoice[] = [];
+  state.active.forEach((kinds, code) => {
+    kinds.forEach((value, kind) => {
+      out.push({ submission_code: code, choice_kind: kind, choice_value: value });
+    });
+  });
+  return out;
+}

frontend/src/client/views/verfahrensablauf-core.test.ts

@@ -191,6 +191,48 @@ describe("bucketDeadlinesIntoColumns — side+appellant column routing (m/paliad
     expect(rows[0].court.map((d) => d.name)).toEqual(["C"]);
   });
 
+  test("appellantContext overrides the page-level appellant for descendants (t-paliad-265)", () => {
+    // A per-decision pick stamps AppellantContext on descendants of
+    // that decision. The bucketer prefers it over the page-level
+    // appellant: if a "both" row carries appellantContext='defendant',
+    // it collapses to defendant's column regardless of the global
+    // appellant opt.
+    const dl: CalculatedDeadline = {
+      ...both("Notice of Appeal", "2026-07-23"),
+      appellantContext: "defendant",
+    };
+    const rows = bucketDeadlinesIntoColumns([dl], { appellant: "claimant" });
+    expect(rows[0].ours).toHaveLength(0);
+    expect(rows[0].opponent.map((d) => d.name)).toEqual(["Notice of Appeal"]);
+  });
+
+  test("appellantContext='claimant' + side='defendant' lands the row in opponent (claimant ≠ us)", () => {
+    // The user is on the defendant side; per-card pick says the
+    // claimant appealed. The "both" row collapses to the claimant's
+    // column, which after the side-swap is opponent (right).
+    const dl: CalculatedDeadline = {
+      ...both("Notice of Appeal", "2026-07-23"),
+      appellantContext: "claimant",
+    };
+    const rows = bucketDeadlinesIntoColumns([dl], { side: "defendant", appellant: "defendant" });
+    expect(rows[0].ours).toHaveLength(0);
+    expect(rows[0].opponent.map((d) => d.name)).toEqual(["Notice of Appeal"]);
+  });
+
+  test("appellantContext='both' or 'none' falls back to page-level mirror (t-paliad-265)", () => {
+    // 'both' and 'none' aren't side-collapse values — they're
+    // statements about who appealed but don't pick a column. The
+    // bucketer treats them as no override, so the page-level
+    // appellant (or default mirror) applies.
+    const both1: CalculatedDeadline = {
+      ...both("Notice of Appeal", "2026-07-23"),
+      appellantContext: "both",
+    };
+    const rowsBoth = bucketDeadlinesIntoColumns([both1]);
+    expect(rowsBoth[0].ours.map((d) => d.name)).toEqual(["Notice of Appeal"]);
+    expect(rowsBoth[0].opponent.map((d) => d.name)).toEqual(["Notice of Appeal"]);
+  });
+
   test("unscheduled rows (no dueDate) trail dated rows, preserving declaration order", () => {
     const rows = bucketDeadlinesIntoColumns([
       partySpecific("court", "Oral Hearing", ""),

frontend/src/client/views/verfahrensablauf-core.ts

@@ -61,6 +61,17 @@ export interface CalculatedDeadline {
   // Frontend save-modal logic doesn't read this; the rule editor
   // (Slice 11) is the consumer. Unknown shape on this side — pass-through.
   conditionExpr?: unknown;
+  // choicesOffered (t-paliad-265): declares which per-card choice-kinds
+  // this rule offers on the Verfahrensablauf timeline. Object shape:
+  // { appellant?: string[], include_ccr?: [true,false], skip?: [true,false] }.
+  // null/undefined = no caret affordance.
+  choicesOffered?: Record<string, unknown>;
+  // appellantContext (t-paliad-265): the per-decision appellant pick
+  // that applies to descendants of the closest ancestor decision card
+  // with a per-card appellant set. Empty = no per-card override (the
+  // page-level appellant axis still applies in that case). The bucketer
+  // reads this in preference to the page-level appellant.
+  appellantContext?: string;
 }
 
 // priorityRendering returns the per-priority UX hints the save-modal
@@ -139,6 +150,16 @@ export interface CalcParams {
   flags?: string[];
   anchorOverrides?: Record<string, string>;
   courtId?: string;
+  // t-paliad-265: per-event-card choices. Either pass `projectId` for
+  // server-side lookup against paliad.project_event_choices, OR pass
+  // an inline list (for the unbound /tools/verfahrensablauf surface).
+  // When both are supplied the inline list wins server-side.
+  projectId?: string;
+  perCardChoices?: Array<{
+    submission_code: string;
+    choice_kind: string;
+    choice_value: string;
+  }>;
 }
 
 const PARTY_CLASS: Record<string, string> = {
@@ -272,6 +293,18 @@ export function deadlineCardHtml(dl: CalculatedDeadline, opts: CardOpts): string
     ? '<span class="optional-badge">optional</span>'
     : "";
 
+  // t-paliad-265 — caret affordance + chip indicator when this rule
+  // offers per-card choices and the user has made a pick. The popover
+  // open/commit lifecycle lives in client/views/event-card-choices.ts;
+  // the data-* attributes here are the wire contract between the two.
+  const choicesHtml = dl.code !== "" && dl.choicesOffered && Object.keys(dl.choicesOffered).length > 0
+    ? `<button type="button" class="event-card-choices-caret"
+         data-submission-code="${escAttr(dl.code)}"
+         data-choices-offered="${escAttr(JSON.stringify(dl.choicesOffered))}"
+         aria-label="${escAttr(t("choices.caret.title"))}"
+         title="${escAttr(t("choices.caret.title"))}">▾</button>`
+    : "";
+
   const dlName = getLang() === "en" ? dl.nameEN : dl.name;
 
   const adjustedNote = dl.wasAdjusted
@@ -310,12 +343,22 @@ export function deadlineCardHtml(dl: CalculatedDeadline, opts: CardOpts): string
       </div>`
     : "";
 
+  // Chip indicator surfaces the active per-card pick (t-paliad-265).
+  // The popover module rehydrates this on commit so it stays in sync.
+  const chipHtml = dl.code !== ""
+    ? `<span class="event-card-choices-chip"
+         data-submission-code="${escAttr(dl.code)}"
+         data-empty="true"></span>`
+    : "";
+
   return `<div class="timeline-item-header">
       <span class="timeline-name">
         ${dlName}
         ${mandatoryBadge}
+        ${chipHtml}
       </span>
       ${dateStr}
+      ${choicesHtml}
     </div>
     ${meta}
     ${adjustedNote}
@@ -532,7 +575,15 @@ export function bucketDeadlinesIntoColumns(
         row.court.push(dl);
         break;
       case "both":
-        if (appellantColumn !== null) {
+        // t-paliad-265: a per-card appellant set on a decision
+        // ancestor propagates as appellantContext on this rule. When
+        // present, it overrides the page-level appellant for the
+        // collapse decision on THIS row. Falls through to page-level
+        // when empty.
+        if (dl.appellantContext === "claimant" || dl.appellantContext === "defendant") {
+          const perCardCol = dl.appellantContext === "claimant" ? claimantColumn : defendantColumn;
+          row[perCardCol].push(dl);
+        } else if (appellantColumn !== null) {
           // Role-swap collapse: appellant initiated → both → one row
           // in appellant's column. Mirror suppressed.
           row[appellantColumn].push(dl);
@@ -625,6 +676,10 @@ export async function calculateDeadlines(params: CalcParams): Promise<DeadlineRe
           ? params.anchorOverrides
           : undefined,
         courtId: params.courtId || undefined,
+        projectId: params.projectId || undefined,
+        perCardChoices: params.perCardChoices && params.perCardChoices.length > 0
+          ? params.perCardChoices
+          : undefined,
       }),
     });
     if (!resp.ok) {

frontend/src/i18n-keys.ts

@@ -1008,6 +1008,23 @@ export type I18nKey =
   | "checklisten.tab.mine"
   | "checklisten.tab.templates"
   | "checklisten.title"
+  | "choices.appellant.both"
+  | "choices.appellant.chip"
+  | "choices.appellant.claimant"
+  | "choices.appellant.defendant"
+  | "choices.appellant.none"
+  | "choices.appellant.title"
+  | "choices.caret.title"
+  | "choices.commit.error"
+  | "choices.include_ccr.chip"
+  | "choices.include_ccr.false"
+  | "choices.include_ccr.title"
+  | "choices.include_ccr.true"
+  | "choices.reset"
+  | "choices.skip.false"
+  | "choices.skip.title"
+  | "choices.skip.true"
+  | "choices.skipped.chip"
   | "common.cancel"
   | "common.close"
   | "common.forbidden"

frontend/src/styles/global.css

@@ -3476,6 +3476,133 @@ input[type="range"]::-moz-range-thumb {
     color: var(--status-amber-fg);
 }
 
+/* t-paliad-265 — per-event-card optional choices. The caret sits in
+ * the card header next to the date; the chip surfaces the active pick
+ * inline with the title; the popover is body-attached and positioned
+ * by the JS module. Skipped rows fade to 50% opacity. */
+.event-card-choices-caret {
+    display: inline-flex;
+    align-items: center;
+    justify-content: center;
+    width: 22px;
+    height: 22px;
+    margin-left: 0.4rem;
+    border: 1px solid var(--color-border, #d4d4d4);
+    border-radius: 4px;
+    background: transparent;
+    color: var(--color-text-muted);
+    font-size: 0.85rem;
+    cursor: pointer;
+    line-height: 1;
+}
+
+.event-card-choices-caret:hover,
+.event-card-choices-caret:focus-visible {
+    background: var(--color-accent-bg, rgba(198, 244, 28, 0.18));
+    color: var(--color-text);
+}
+
+.event-card-choices-chip {
+    display: inline-flex;
+    gap: 0.3rem;
+    margin-left: 0.4rem;
+}
+
+.event-card-choices-chip[data-empty="true"] {
+    display: none;
+}
+
+.event-card-choices-chip-part {
+    font-size: 0.7rem;
+    font-weight: 500;
+    padding: 0.05rem 0.4rem;
+    border-radius: 99px;
+    background: var(--color-accent-bg, rgba(198, 244, 28, 0.22));
+    color: var(--color-text);
+}
+
+.event-card-choices-chip-part--skipped {
+    background: var(--color-bg-soft, #f1f1f1);
+    color: var(--color-text-muted);
+    text-decoration: line-through;
+}
+
+.timeline-item--skipped {
+    opacity: 0.55;
+}
+
+.event-card-choices-popover {
+    background: var(--color-bg, #fff);
+    border: 1px solid var(--color-border, #d4d4d4);
+    border-radius: 6px;
+    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
+    padding: 0.6rem 0.7rem;
+    min-width: 240px;
+    max-width: 320px;
+}
+
+.event-card-choices-block + .event-card-choices-block {
+    margin-top: 0.7rem;
+    padding-top: 0.6rem;
+    border-top: 1px solid var(--color-border-soft, #ececec);
+}
+
+.event-card-choices-title {
+    font-size: 0.78rem;
+    font-weight: 600;
+    color: var(--color-text);
+    margin-bottom: 0.4rem;
+}
+
+.event-card-choices-options {
+    display: flex;
+    flex-wrap: wrap;
+    gap: 0.3rem;
+}
+
+.event-card-choices-option {
+    font-size: 0.78rem;
+    padding: 0.25rem 0.55rem;
+    border-radius: 4px;
+    border: 1px solid var(--color-border, #d4d4d4);
+    background: var(--color-bg, #fff);
+    color: var(--color-text);
+    cursor: pointer;
+}
+
+.event-card-choices-option:hover,
+.event-card-choices-option:focus-visible {
+    background: var(--color-bg-soft, #f1f1f1);
+}
+
+.event-card-choices-option--active {
+    background: var(--color-accent, #c6f41c);
+    border-color: var(--color-accent, #c6f41c);
+    color: var(--color-text);
+    font-weight: 600;
+}
+
+.event-card-choices-reset {
+    margin-top: 0.5rem;
+    font-size: 0.72rem;
+    background: transparent;
+    border: none;
+    color: var(--color-text-muted);
+    text-decoration: underline;
+    cursor: pointer;
+    padding: 0;
+}
+
+.event-card-choices-reset:hover {
+    color: var(--color-text);
+}
+
+.event-card-choices-error {
+    margin-top: 0.5rem;
+    font-size: 0.74rem;
+    color: var(--status-red-fg, #b00020);
+}
+
 .timeline-rule {
     font-family: var(--font-mono);
     font-size: 0.72rem;

internal/db/migrations/129_project_event_choices.down.sql

@@ -0,0 +1,11 @@
+-- t-paliad-265 — drop per-event-card choices schema.
+
+SELECT set_config(
+    'paliad.audit_reason',
+    'mig 129 down: drop project_event_choices + deadline_rules.choices_offered',
+    true);
+
+DROP TABLE IF EXISTS paliad.project_event_choices;
+
+ALTER TABLE paliad.deadline_rules
+    DROP COLUMN IF EXISTS choices_offered;

internal/db/migrations/129_project_event_choices.up.sql

@@ -0,0 +1,116 @@
+-- t-paliad-265 / m/paliad#96 — per-event-card optional choices on the
+-- Verfahrensablauf timeline.
+--
+-- Design: docs/design-event-card-choices-2026-05-25.md
+-- Decisions: see §11 of the design doc.
+--
+-- Two schema changes:
+--
+--   1. paliad.project_event_choices — new persistence table holding the
+--      user's per-card picks scoped to a project. One row per
+--      (project, submission_code, choice_kind). Re-picking is an UPDATE
+--      (UNIQUE constraint enforces idempotence).
+--
+--   2. paliad.deadline_rules.choices_offered jsonb — opt-in declaration
+--      of which choice-kinds each rule offers. The projection engine
+--      reads this to decide whether to render the caret affordance on
+--      a card. Seeded for every event_type='decision' rule (appellant),
+--      every priority='optional' rule (skip), and the two Klageerwiderung
+--      rows (include_ccr).
+--
+-- NOTE on join key: the design doc named the join column "rule_code".
+-- Live verification (2026-05-25 SELECT against paliad.deadline_rules)
+-- showed `rule_code` is NULL on every decision row — it's the legal-
+-- source citation column, not a stable identifier. The
+-- AnchorOverrides plumbing in internal/services/fristenrechner.go
+-- already keys on `submission_code` (UIDeadline.Code populates from
+-- submission_code, lines 351-352), so we mirror that decision here:
+-- the join column is `submission_code`. Same intent, correct field.
+--
+-- Idempotent: CREATE TABLE IF NOT EXISTS + ADD COLUMN IF NOT EXISTS +
+-- UPDATEs guarded by WHERE choices_offered IS NULL so re-applying
+-- against an already-seeded DB no-ops.
+
+SELECT set_config(
+    'paliad.audit_reason',
+    'mig 129: add paliad.project_event_choices + deadline_rules.choices_offered for per-event-card optional choices (t-paliad-265 / m/paliad#96)',
+    true);
+
+-- 1. The choice-storage table ----------------------------------------------
+
+CREATE TABLE IF NOT EXISTS paliad.project_event_choices (
+    id              uuid PRIMARY KEY DEFAULT gen_random_uuid(),
+    project_id      uuid NOT NULL REFERENCES paliad.projects(id) ON DELETE CASCADE,
+    submission_code text NOT NULL,
+    choice_kind     text NOT NULL CHECK (choice_kind IN ('appellant', 'include_ccr', 'skip')),
+    choice_value    text NOT NULL,
+    created_by      uuid REFERENCES paliad.users(id) ON DELETE SET NULL,
+    created_at      timestamptz NOT NULL DEFAULT now(),
+    updated_by      uuid REFERENCES paliad.users(id) ON DELETE SET NULL,
+    updated_at      timestamptz NOT NULL DEFAULT now(),
+
+    UNIQUE (project_id, submission_code, choice_kind)
+);
+
+CREATE INDEX IF NOT EXISTS project_event_choices_project_idx
+    ON paliad.project_event_choices (project_id);
+
+ALTER TABLE paliad.project_event_choices ENABLE ROW LEVEL SECURITY;
+
+DROP POLICY IF EXISTS project_event_choices_select ON paliad.project_event_choices;
+CREATE POLICY project_event_choices_select ON paliad.project_event_choices
+    FOR SELECT USING (paliad.can_see_project(project_id));
+
+DROP POLICY IF EXISTS project_event_choices_mutate ON paliad.project_event_choices;
+CREATE POLICY project_event_choices_mutate ON paliad.project_event_choices
+    FOR ALL
+    USING (paliad.can_see_project(project_id))
+    WITH CHECK (paliad.can_see_project(project_id));
+
+COMMENT ON TABLE paliad.project_event_choices IS
+    'Per-event-card user picks scoped to a project. choice_kind ∈ {appellant, include_ccr, skip}. '
+    'choice_value namespace per kind: appellant=claimant|defendant|both|none; include_ccr=true|false; '
+    'skip=true|false. Join key submission_code matches paliad.deadline_rules.submission_code (the same key '
+    'AnchorOverrides uses). UNIQUE(project,submission_code,kind) keeps re-picks idempotent. '
+    'Audit-logged via paliad.system_audit_log (event_type=project_event_choice.set).';
+
+-- 2. The choices_offered opt-in column ------------------------------------
+
+ALTER TABLE paliad.deadline_rules
+    ADD COLUMN IF NOT EXISTS choices_offered jsonb;
+
+COMMENT ON COLUMN paliad.deadline_rules.choices_offered IS
+    'Declares which per-card choice-kinds this rule offers on the Verfahrensablauf timeline. '
+    'NULL = no caret affordance (default). Example shapes: '
+    '{"appellant": ["claimant","defendant","both","none"]} on decision rules, '
+    '{"skip": [true, false]} on optional rules, '
+    '{"include_ccr": [true, false]} on Klageerwiderung rules. '
+    'Engine and frontend read it; storing per-kind value lists keeps the contract self-describing.';
+
+-- 3. Seed -----------------------------------------------------------------
+
+-- 3a. Every published decision rule offers the appellant choice.
+UPDATE paliad.deadline_rules
+   SET choices_offered = '{"appellant": ["claimant", "defendant", "both", "none"]}'::jsonb
+ WHERE event_type = 'decision'
+   AND lifecycle_state = 'published'
+   AND choices_offered IS NULL;
+
+-- 3b. Every published optional rule offers the skip choice.
+UPDATE paliad.deadline_rules
+   SET choices_offered = '{"skip": [true, false]}'::jsonb
+ WHERE priority = 'optional'
+   AND lifecycle_state = 'published'
+   AND choices_offered IS NULL;
+
+-- 3c. Klageerwiderung rules offer the include_ccr choice. Two rows
+-- today (upc.inf.cfi.sod + de.inf.lg.erwidg) — verified live
+-- (2026-05-25 SELECT FROM paliad.deadline_rules WHERE name ILIKE
+-- 'Klageerwiderung'); the UPC INF Klageerwiderung is `sod` (Statement
+-- of Defence, R.24 RoP), not `def`. Slice B (Q4 bundle) is the
+-- user-visible feature.
+UPDATE paliad.deadline_rules
+   SET choices_offered = '{"include_ccr": [true, false]}'::jsonb
+ WHERE submission_code IN ('upc.inf.cfi.sod', 'de.inf.lg.erwidg')
+   AND lifecycle_state = 'published'
+   AND choices_offered IS NULL;

internal/handlers/event_choices.go

@@ -0,0 +1,113 @@
+package handlers
+
+// HTTP handlers for paliad.project_event_choices (t-paliad-265 / m/paliad#96).
+//
+// Three endpoints:
+//   GET    /api/projects/{id}/event-choices            → list
+//   PUT    /api/projects/{id}/event-choices            → upsert one
+//   DELETE /api/projects/{id}/event-choices/{submission_code}/{choice_kind}
+//
+// All three gated by visibility on the project (paliad.can_see_project)
+// via EventChoiceService.
+
+import (
+	"encoding/json"
+	"errors"
+	"net/http"
+
+	"github.com/google/uuid"
+
+	"mgit.msbls.de/m/paliad/internal/services"
+)
+
+// GET /api/projects/{id}/event-choices
+func handleListProjectEventChoices(w http.ResponseWriter, r *http.Request) {
+	if !requireDB(w) {
+		return
+	}
+	uid, ok := requireUser(w, r)
+	if !ok {
+		return
+	}
+	if dbSvc.eventChoice == nil {
+		writeJSON(w, http.StatusServiceUnavailable, map[string]string{"error": "event-choice service not configured"})
+		return
+	}
+	projectID, err := uuid.Parse(r.PathValue("id"))
+	if err != nil {
+		writeJSON(w, http.StatusBadRequest, map[string]string{"error": "invalid project id"})
+		return
+	}
+	rows, err := dbSvc.eventChoice.ListForProject(r.Context(), uid, projectID)
+	if err != nil {
+		writeServiceError(w, err)
+		return
+	}
+	writeJSON(w, http.StatusOK, rows)
+}
+
+// PUT /api/projects/{id}/event-choices — upsert one row.
+func handlePutProjectEventChoice(w http.ResponseWriter, r *http.Request) {
+	if !requireDB(w) {
+		return
+	}
+	uid, ok := requireUser(w, r)
+	if !ok {
+		return
+	}
+	if dbSvc.eventChoice == nil {
+		writeJSON(w, http.StatusServiceUnavailable, map[string]string{"error": "event-choice service not configured"})
+		return
+	}
+	projectID, err := uuid.Parse(r.PathValue("id"))
+	if err != nil {
+		writeJSON(w, http.StatusBadRequest, map[string]string{"error": "invalid project id"})
+		return
+	}
+	var input services.UpsertEventChoiceInput
+	if err := json.NewDecoder(r.Body).Decode(&input); err != nil {
+		writeJSON(w, http.StatusBadRequest, map[string]string{"error": "invalid JSON body"})
+		return
+	}
+	row, err := dbSvc.eventChoice.Upsert(r.Context(), uid, projectID, input)
+	if err != nil {
+		if errors.Is(err, services.ErrInvalidInput) {
+			writeJSON(w, http.StatusBadRequest, map[string]string{"error": err.Error()})
+			return
+		}
+		writeServiceError(w, err)
+		return
+	}
+	writeJSON(w, http.StatusOK, row)
+}
+
+// DELETE /api/projects/{id}/event-choices/{submission_code}/{choice_kind}
+func handleDeleteProjectEventChoice(w http.ResponseWriter, r *http.Request) {
+	if !requireDB(w) {
+		return
+	}
+	uid, ok := requireUser(w, r)
+	if !ok {
+		return
+	}
+	if dbSvc.eventChoice == nil {
+		writeJSON(w, http.StatusServiceUnavailable, map[string]string{"error": "event-choice service not configured"})
+		return
+	}
+	projectID, err := uuid.Parse(r.PathValue("id"))
+	if err != nil {
+		writeJSON(w, http.StatusBadRequest, map[string]string{"error": "invalid project id"})
+		return
+	}
+	submissionCode := r.PathValue("submission_code")
+	choiceKind := r.PathValue("choice_kind")
+	if err := dbSvc.eventChoice.Delete(r.Context(), uid, projectID, submissionCode, choiceKind); err != nil {
+		if errors.Is(err, services.ErrInvalidInput) {
+			writeJSON(w, http.StatusBadRequest, map[string]string{"error": err.Error()})
+			return
+		}
+		writeServiceError(w, err)
+		return
+	}
+	w.WriteHeader(http.StatusNoContent)
+}

internal/handlers/fristenrechner.go

@@ -5,6 +5,9 @@ import (
 	"errors"
 	"net/http"
 
+	"github.com/google/uuid"
+
+	"mgit.msbls.de/m/paliad/internal/models"
 	"mgit.msbls.de/m/paliad/internal/services"
 )
 
@@ -51,6 +54,15 @@ func handleFristenrechnerAPI(w http.ResponseWriter, r *http.Request) {
 		Flags           []string          `json:"flags,omitempty"`
 		AnchorOverrides map[string]string `json:"anchorOverrides,omitempty"`
 		CourtID         string            `json:"courtId,omitempty"`
+		// t-paliad-265: per-event-card choices. Two parallel inputs:
+		// - ProjectID lets the server pull persisted choices from
+		//   paliad.project_event_choices (project-bound /tools/fristenrechner).
+		// - PerCardChoices lets the unbound /tools/verfahrensablauf
+		//   send an inline-CSV-decoded list straight off the URL
+		//   without persisting. When both are present the inline list
+		//   wins (what-if exploration overrides the saved state).
+		ProjectID       string                                  `json:"projectId,omitempty"`
+		PerCardChoices  []services.UpsertEventChoiceInput       `json:"perCardChoices,omitempty"`
 	}
 	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
 		writeJSON(w, http.StatusBadRequest, map[string]string{"error": "Ungültige Anfrage"})
@@ -61,11 +73,42 @@ func handleFristenrechnerAPI(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
+	// Fold per-card choices into the CalcOptions addendum. The inline
+	// PerCardChoices wins over the persisted ProjectID lookup when both
+	// are non-empty.
+	var addendum services.CalcOptionsAddendum
+	if len(req.PerCardChoices) > 0 {
+		choices := make([]models.ProjectEventChoice, 0, len(req.PerCardChoices))
+		for _, c := range req.PerCardChoices {
+			choices = append(choices, models.ProjectEventChoice{
+				SubmissionCode: c.SubmissionCode,
+				ChoiceKind:     c.ChoiceKind,
+				ChoiceValue:    c.ChoiceValue,
+			})
+		}
+		addendum = services.ToCalcOptionsAddendum(choices)
+	} else if req.ProjectID != "" && dbSvc.eventChoice != nil {
+		if pid, err := uuid.Parse(req.ProjectID); err == nil {
+			if uid, ok := requireUser(w, r); ok {
+				if choices, err := dbSvc.eventChoice.ListForProject(r.Context(), uid, pid); err == nil {
+					addendum = services.ToCalcOptionsAddendum(choices)
+				}
+				// Visibility-filtered lookup: a non-visible project
+				// returns ErrNotVisible from ListForProject; in that
+				// case we project without per-card overlays rather
+				// than 404 — the timeline itself is non-PII data.
+			}
+		}
+	}
+
 	resp, err := dbSvc.fristenrechner.Calculate(r.Context(), req.ProceedingType, req.TriggerDate, services.CalcOptions{
-		PriorityDateStr: req.PriorityDate,
-		Flags:           req.Flags,
-		AnchorOverrides: req.AnchorOverrides,
-		CourtID:         req.CourtID,
+		PriorityDateStr:  req.PriorityDate,
+		Flags:            req.Flags,
+		AnchorOverrides:  req.AnchorOverrides,
+		CourtID:          req.CourtID,
+		PerCardAppellant: addendum.PerCardAppellant,
+		SkipRules:        addendum.SkipRules,
+		IncludeCCRFor:    addendum.IncludeCCRFor,
 	})
 	if err != nil {
 		if errors.Is(err, services.ErrUnknownProceedingType) {

internal/handlers/handlers.go

@@ -106,6 +106,10 @@ type Services struct {
 	// t-paliad-238 — dedicated Submissions/Schriftsätze editor.
 	SubmissionDraft *services.SubmissionDraftService
 
+	// t-paliad-265 / m/paliad#96 — per-event-card optional choices on
+	// the Verfahrensablauf timeline.
+	EventChoice *services.EventChoiceService
+
 	// Paliadin is wired when DATABASE_URL is set. The concrete backend
 	// is picked in cmd/server/main.go based on PALIADIN_REMOTE_HOST
 	// (remote → mRiver via SSH) or local tmux availability. Stays nil
@@ -169,6 +173,7 @@ func Register(mux *http.ServeMux, client *auth.Client, giteaAPIToken string, svc
 			export:          svc.Export,
 			backup:          svc.Backup,
 			submissionDraft: svc.SubmissionDraft,
+			eventChoice:     svc.EventChoice,
 		}
 	}
 
@@ -390,6 +395,11 @@ func Register(mux *http.ServeMux, client *auth.Client, giteaAPIToken string, svc
 	protected.HandleFunc("POST /api/projects/{id}/partner-units", handleAttachPartnerUnit)
 	protected.HandleFunc("DELETE /api/projects/{id}/partner-units/{unit_id}", handleDetachPartnerUnit)
 
+	// t-paliad-265 — per-event-card choices on the Verfahrensablauf timeline.
+	protected.HandleFunc("GET /api/projects/{id}/event-choices", handleListProjectEventChoices)
+	protected.HandleFunc("PUT /api/projects/{id}/event-choices", handlePutProjectEventChoice)
+	protected.HandleFunc("DELETE /api/projects/{id}/event-choices/{submission_code}/{choice_kind}", handleDeleteProjectEventChoice)
+
 	// Partner units (structural partner-led units; legacy "Dezernate").
 	protected.HandleFunc("GET /api/partner-units", handleListPartnerUnits)
 	protected.HandleFunc("POST /api/partner-units", handleCreatePartnerUnit)

internal/handlers/projects.go

@@ -68,6 +68,9 @@ type dbServices struct {
 
 	// t-paliad-238 — submission draft editor.
 	submissionDraft *services.SubmissionDraftService
+
+	// t-paliad-265 — per-event-card optional choices.
+	eventChoice *services.EventChoiceService
 }
 
 var dbSvc *dbServices

internal/models/models.go

@@ -682,6 +682,13 @@ type DeadlineRule struct {
 	// NULL while draft, set on publish, retained through archive.
 	// Distinct from UpdatedAt (moves on every edit).
 	PublishedAt *time.Time `db:"published_at" json:"published_at,omitempty"`
+
+	// ChoicesOffered declares which per-event-card choice-kinds this
+	// rule offers on the Verfahrensablauf timeline (mig 129,
+	// t-paliad-265). NULL = no caret affordance (default). See the
+	// COMMENT on paliad.deadline_rules.choices_offered for the value
+	// shape. The engine and the frontend both read this column.
+	ChoicesOffered NullableJSON `db:"choices_offered" json:"choices_offered,omitempty"`
 }
 
 // DeadlineRuleAudit is one row of paliad.deadline_rule_audit — the
@@ -946,3 +953,24 @@ type ApprovalRequest struct {
 	CreatedAt         time.Time  `db:"created_at"          json:"created_at"`
 	UpdatedAt         time.Time  `db:"updated_at"          json:"updated_at"`
 }
+
+// ProjectEventChoice is one per-event-card pick scoped to a project
+// (t-paliad-265 / m/paliad#96). The join key SubmissionCode matches
+// paliad.deadline_rules.submission_code — the same identifier the
+// AnchorOverrides plumbing in fristenrechner.go already uses.
+//
+// ChoiceKind ∈ {appellant, include_ccr, skip}. ChoiceValue namespace
+// per kind: appellant=claimant|defendant|both|none; include_ccr=true|false;
+// skip=true|false. UNIQUE(project_id, submission_code, choice_kind)
+// makes re-picks idempotent (Upsert path).
+type ProjectEventChoice struct {
+	ID             uuid.UUID  `db:"id"              json:"id"`
+	ProjectID      uuid.UUID  `db:"project_id"      json:"project_id"`
+	SubmissionCode string     `db:"submission_code" json:"submission_code"`
+	ChoiceKind     string     `db:"choice_kind"     json:"choice_kind"`
+	ChoiceValue    string     `db:"choice_value"    json:"choice_value"`
+	CreatedBy      *uuid.UUID `db:"created_by"      json:"created_by,omitempty"`
+	CreatedAt      time.Time  `db:"created_at"      json:"created_at"`
+	UpdatedBy      *uuid.UUID `db:"updated_by"      json:"updated_by,omitempty"`
+	UpdatedAt      time.Time  `db:"updated_at"      json:"updated_at"`
+}

internal/services/deadline_rule_service.go

@@ -34,7 +34,8 @@ const ruleColumns = `id, proceeding_type_id, parent_id, submission_code, name, n
 	anchor_alt, concept_id, legal_source, is_spawn, spawn_label, is_active,
 	created_at, updated_at,
 	trigger_event_id, spawn_proceeding_type_id, combine_op, condition_expr,
-	priority, is_court_set, lifecycle_state, draft_of, published_at`
+	priority, is_court_set, lifecycle_state, draft_of, published_at,
+	choices_offered`
 
 const proceedingTypeColumns = `id, code, name, name_en, description, jurisdiction,
 	category, default_color, sort_order, is_active`

internal/services/event_choice_service.go

@@ -0,0 +1,272 @@
+package services
+
+import (
+	"context"
+	"database/sql"
+	"errors"
+	"fmt"
+
+	"github.com/google/uuid"
+	"github.com/jmoiron/sqlx"
+
+	"mgit.msbls.de/m/paliad/internal/models"
+)
+
+// EventChoiceService reads and writes paliad.project_event_choices —
+// per-event-card user picks scoped to a project (t-paliad-265 /
+// m/paliad#96). Three choice kinds today:
+//
+//	appellant   — claimant | defendant | both | none
+//	include_ccr — true | false
+//	skip        — true | false
+//
+// Visibility follows paliad.can_see_project (via ProjectService.CanSee).
+// Audits via paliad.system_audit_log with event_type=project_event_choice.set
+// (insert/update) or .deleted (delete).
+//
+// The CRUD surface is intentionally tight: List for a project (one read),
+// Upsert one (idempotent re-pick), Delete one (kind-scoped). The
+// projection engine receives the choices via ToCalcOptionsAddendum,
+// which folds them into CalcOptions before Calculate runs.
+type EventChoiceService struct {
+	db       *sqlx.DB
+	projects *ProjectService
+	users    *UserService
+}
+
+func NewEventChoiceService(db *sqlx.DB, projects *ProjectService, users *UserService) *EventChoiceService {
+	return &EventChoiceService{db: db, projects: projects, users: users}
+}
+
+// Allowed choice kinds + per-kind value namespaces. Validated server-side
+// before any write; the DB CHECK constraint catches the same shape but
+// the early validation gives a friendlier error and short-circuits the
+// transaction.
+var (
+	allowedChoiceKinds = map[string]map[string]struct{}{
+		"appellant":   {"claimant": {}, "defendant": {}, "both": {}, "none": {}},
+		"include_ccr": {"true": {}, "false": {}},
+		"skip":        {"true": {}, "false": {}},
+	}
+)
+
+func validateChoice(kind, value string) error {
+	values, ok := allowedChoiceKinds[kind]
+	if !ok {
+		return fmt.Errorf("%w: unknown choice_kind %q", ErrInvalidInput, kind)
+	}
+	if _, ok := values[value]; !ok {
+		return fmt.Errorf("%w: invalid choice_value %q for kind %q", ErrInvalidInput, value, kind)
+	}
+	return nil
+}
+
+// ListForProject returns every choice row for the given project. Caller
+// must hold visibility on the project.
+func (s *EventChoiceService) ListForProject(ctx context.Context, userID, projectID uuid.UUID) ([]models.ProjectEventChoice, error) {
+	if err := s.requireProjectVisible(ctx, userID, projectID); err != nil {
+		return nil, err
+	}
+	out := []models.ProjectEventChoice{}
+	err := s.db.SelectContext(ctx, &out,
+		`SELECT id, project_id, submission_code, choice_kind, choice_value,
+		        created_by, created_at, updated_by, updated_at
+		   FROM paliad.project_event_choices
+		  WHERE project_id = $1
+		  ORDER BY submission_code, choice_kind`, projectID)
+	if err != nil {
+		return nil, fmt.Errorf("list event choices: %w", err)
+	}
+	return out, nil
+}
+
+// UpsertInput is the body shape for an upsert.
+type UpsertEventChoiceInput struct {
+	SubmissionCode string `json:"submission_code"`
+	ChoiceKind     string `json:"choice_kind"`
+	ChoiceValue    string `json:"choice_value"`
+}
+
+// Upsert inserts or updates one (project, submission_code, choice_kind)
+// row. Audit-log row written in the same tx.
+func (s *EventChoiceService) Upsert(ctx context.Context, userID, projectID uuid.UUID, input UpsertEventChoiceInput) (*models.ProjectEventChoice, error) {
+	if err := s.requireProjectVisible(ctx, userID, projectID); err != nil {
+		return nil, err
+	}
+	if input.SubmissionCode == "" {
+		return nil, fmt.Errorf("%w: submission_code required", ErrInvalidInput)
+	}
+	if err := validateChoice(input.ChoiceKind, input.ChoiceValue); err != nil {
+		return nil, err
+	}
+
+	actorEmail, err := s.actorEmail(ctx, userID)
+	if err != nil {
+		return nil, err
+	}
+
+	tx, err := s.db.BeginTxx(ctx, nil)
+	if err != nil {
+		return nil, fmt.Errorf("begin tx: %w", err)
+	}
+	defer func() { _ = tx.Rollback() }()
+
+	if _, err := tx.ExecContext(ctx,
+		`SELECT set_config('paliad.audit_reason',
+		     'project_event_choice.set ('||$1||','||$2||','||$3||')', true)`,
+		input.SubmissionCode, input.ChoiceKind, input.ChoiceValue); err != nil {
+		return nil, fmt.Errorf("set audit reason: %w", err)
+	}
+
+	var row models.ProjectEventChoice
+	err = tx.GetContext(ctx, &row,
+		`INSERT INTO paliad.project_event_choices
+		     (project_id, submission_code, choice_kind, choice_value, created_by, updated_by)
+		 VALUES ($1, $2, $3, $4, $5, $5)
+		 ON CONFLICT (project_id, submission_code, choice_kind)
+		 DO UPDATE SET choice_value = EXCLUDED.choice_value,
+		               updated_by   = EXCLUDED.updated_by,
+		               updated_at   = now()
+		 RETURNING id, project_id, submission_code, choice_kind, choice_value,
+		           created_by, created_at, updated_by, updated_at`,
+		projectID, input.SubmissionCode, input.ChoiceKind, input.ChoiceValue, userID)
+	if err != nil {
+		return nil, fmt.Errorf("upsert event choice: %w", err)
+	}
+
+	if err := writeChoiceAudit(ctx, tx, "project_event_choice.set", userID, actorEmail, projectID, input.SubmissionCode, input.ChoiceKind, input.ChoiceValue); err != nil {
+		return nil, err
+	}
+
+	if err := tx.Commit(); err != nil {
+		return nil, fmt.Errorf("commit upsert: %w", err)
+	}
+	return &row, nil
+}
+
+// Delete removes the (project, submission_code, choice_kind) row.
+// Returns ErrNotVisible if the project isn't visible OR the row didn't
+// exist (no leak between the two).
+func (s *EventChoiceService) Delete(ctx context.Context, userID, projectID uuid.UUID, submissionCode, choiceKind string) error {
+	if err := s.requireProjectVisible(ctx, userID, projectID); err != nil {
+		return err
+	}
+	if submissionCode == "" || choiceKind == "" {
+		return fmt.Errorf("%w: submission_code + choice_kind required", ErrInvalidInput)
+	}
+	if _, ok := allowedChoiceKinds[choiceKind]; !ok {
+		return fmt.Errorf("%w: unknown choice_kind %q", ErrInvalidInput, choiceKind)
+	}
+
+	actorEmail, err := s.actorEmail(ctx, userID)
+	if err != nil {
+		return err
+	}
+
+	tx, err := s.db.BeginTxx(ctx, nil)
+	if err != nil {
+		return fmt.Errorf("begin tx: %w", err)
+	}
+	defer func() { _ = tx.Rollback() }()
+
+	if _, err := tx.ExecContext(ctx,
+		`SELECT set_config('paliad.audit_reason',
+		     'project_event_choice.deleted ('||$1||','||$2||')', true)`,
+		submissionCode, choiceKind); err != nil {
+		return fmt.Errorf("set audit reason: %w", err)
+	}
+
+	res, err := tx.ExecContext(ctx,
+		`DELETE FROM paliad.project_event_choices
+		  WHERE project_id = $1 AND submission_code = $2 AND choice_kind = $3`,
+		projectID, submissionCode, choiceKind)
+	if err != nil {
+		return fmt.Errorf("delete event choice: %w", err)
+	}
+	n, _ := res.RowsAffected()
+	if n == 0 {
+		return ErrNotVisible
+	}
+	if err := writeChoiceAudit(ctx, tx, "project_event_choice.deleted", userID, actorEmail, projectID, submissionCode, choiceKind, ""); err != nil {
+		return err
+	}
+	return tx.Commit()
+}
+
+// CalcOptionsAddendum is the per-card slice of CalcOptions, built from
+// the persisted choices. ProjectionService folds these into the parent
+// CalcOptions before Calculate runs.
+type CalcOptionsAddendum struct {
+	PerCardAppellant map[string]string   // submission_code → appellant value
+	SkipRules        map[string]struct{} // set of submission_code
+	IncludeCCRFor    map[string]struct{} // set of submission_code
+}
+
+// ToCalcOptionsAddendum converts a list of choices into the calc-options
+// shape. Empty input yields an addendum whose maps are non-nil but empty
+// so callers can use map indexing without nil checks.
+func ToCalcOptionsAddendum(choices []models.ProjectEventChoice) CalcOptionsAddendum {
+	out := CalcOptionsAddendum{
+		PerCardAppellant: map[string]string{},
+		SkipRules:        map[string]struct{}{},
+		IncludeCCRFor:    map[string]struct{}{},
+	}
+	for _, c := range choices {
+		switch c.ChoiceKind {
+		case "appellant":
+			out.PerCardAppellant[c.SubmissionCode] = c.ChoiceValue
+		case "skip":
+			if c.ChoiceValue == "true" {
+				out.SkipRules[c.SubmissionCode] = struct{}{}
+			}
+		case "include_ccr":
+			if c.ChoiceValue == "true" {
+				out.IncludeCCRFor[c.SubmissionCode] = struct{}{}
+			}
+		}
+	}
+	return out
+}
+
+// writeChoiceAudit inserts a project-scoped row into paliad.system_audit_log
+// with the choice details in metadata. Same shape as the data-export +
+// checklist audit writers.
+func writeChoiceAudit(ctx context.Context, tx *sqlx.Tx, eventType string, actorID uuid.UUID, actorEmail string, projectID uuid.UUID, submissionCode, choiceKind, choiceValue string) error {
+	if _, err := tx.ExecContext(ctx,
+		`INSERT INTO paliad.system_audit_log
+		     (event_type, actor_id, actor_email, scope, scope_root, metadata)
+		 VALUES ($1, $2, $3, 'project', $4,
+		         jsonb_build_object(
+		             'submission_code', $5::text,
+		             'choice_kind',     $6::text,
+		             'choice_value',    $7::text
+		         ))`,
+		eventType, actorID, actorEmail, projectID, submissionCode, choiceKind, choiceValue); err != nil {
+		return fmt.Errorf("audit insert: %w", err)
+	}
+	return nil
+}
+
+func (s *EventChoiceService) actorEmail(ctx context.Context, userID uuid.UUID) (string, error) {
+	var email string
+	err := s.db.GetContext(ctx, &email,
+		`SELECT email FROM paliad.users WHERE id = $1`, userID)
+	if errors.Is(err, sql.ErrNoRows) {
+		return "", ErrNotVisible
+	}
+	if err != nil {
+		return "", fmt.Errorf("lookup actor: %w", err)
+	}
+	return email, nil
+}
+
+func (s *EventChoiceService) requireProjectVisible(ctx context.Context, userID, projectID uuid.UUID) error {
+	visible, err := s.projects.CanSee(ctx, userID, projectID)
+	if err != nil {
+		return err
+	}
+	if !visible {
+		return ErrNotVisible
+	}
+	return nil
+}

internal/services/event_choice_service_test.go

@@ -0,0 +1,108 @@
+package services
+
+import (
+	"testing"
+
+	"mgit.msbls.de/m/paliad/internal/models"
+)
+
+// Unit tests for the pure helpers in event_choice_service.go. The CRUD
+// path needs a live DB and lives in the integration suite.
+
+func TestValidateChoice_Appellant(t *testing.T) {
+	for _, value := range []string{"claimant", "defendant", "both", "none"} {
+		if err := validateChoice("appellant", value); err != nil {
+			t.Errorf("appellant=%q should pass, got %v", value, err)
+		}
+	}
+	for _, bad := range []string{"", "applicant", "true", "claimaant"} {
+		if err := validateChoice("appellant", bad); err == nil {
+			t.Errorf("appellant=%q should fail validation", bad)
+		}
+	}
+}
+
+func TestValidateChoice_IncludeCCR(t *testing.T) {
+	for _, value := range []string{"true", "false"} {
+		if err := validateChoice("include_ccr", value); err != nil {
+			t.Errorf("include_ccr=%q should pass, got %v", value, err)
+		}
+	}
+	for _, bad := range []string{"", "yes", "1", "True"} {
+		if err := validateChoice("include_ccr", bad); err == nil {
+			t.Errorf("include_ccr=%q should fail validation", bad)
+		}
+	}
+}
+
+func TestValidateChoice_Skip(t *testing.T) {
+	for _, value := range []string{"true", "false"} {
+		if err := validateChoice("skip", value); err != nil {
+			t.Errorf("skip=%q should pass, got %v", value, err)
+		}
+	}
+	if err := validateChoice("skip", "maybe"); err == nil {
+		t.Errorf("skip=maybe should fail")
+	}
+}
+
+func TestValidateChoice_UnknownKind(t *testing.T) {
+	if err := validateChoice("not_a_kind", "true"); err == nil {
+		t.Errorf("unknown choice_kind should fail")
+	}
+}
+
+func TestToCalcOptionsAddendum_PerCardAppellant(t *testing.T) {
+	choices := []models.ProjectEventChoice{
+		{SubmissionCode: "upc.inf.cfi.decision", ChoiceKind: "appellant", ChoiceValue: "defendant"},
+		{SubmissionCode: "de.inf.lg.urteil", ChoiceKind: "appellant", ChoiceValue: "both"},
+	}
+	out := ToCalcOptionsAddendum(choices)
+	if out.PerCardAppellant["upc.inf.cfi.decision"] != "defendant" {
+		t.Errorf("appellant pick for upc.inf.cfi.decision = %q, want defendant", out.PerCardAppellant["upc.inf.cfi.decision"])
+	}
+	if out.PerCardAppellant["de.inf.lg.urteil"] != "both" {
+		t.Errorf("appellant pick for de.inf.lg.urteil = %q, want both", out.PerCardAppellant["de.inf.lg.urteil"])
+	}
+	if len(out.SkipRules) != 0 || len(out.IncludeCCRFor) != 0 {
+		t.Errorf("appellant-only input should not populate skip/include_ccr maps")
+	}
+}
+
+func TestToCalcOptionsAddendum_SkipRules(t *testing.T) {
+	choices := []models.ProjectEventChoice{
+		{SubmissionCode: "upc.inf.cfi.ccr", ChoiceKind: "skip", ChoiceValue: "true"},
+		{SubmissionCode: "upc.inf.cfi.prelim", ChoiceKind: "skip", ChoiceValue: "false"},
+	}
+	out := ToCalcOptionsAddendum(choices)
+	if _, ok := out.SkipRules["upc.inf.cfi.ccr"]; !ok {
+		t.Errorf("skip=true should populate SkipRules")
+	}
+	if _, ok := out.SkipRules["upc.inf.cfi.prelim"]; ok {
+		t.Errorf("skip=false should NOT populate SkipRules")
+	}
+}
+
+func TestToCalcOptionsAddendum_IncludeCCRFor(t *testing.T) {
+	choices := []models.ProjectEventChoice{
+		{SubmissionCode: "upc.inf.cfi.sod", ChoiceKind: "include_ccr", ChoiceValue: "true"},
+		{SubmissionCode: "de.inf.lg.erwidg", ChoiceKind: "include_ccr", ChoiceValue: "false"},
+	}
+	out := ToCalcOptionsAddendum(choices)
+	if _, ok := out.IncludeCCRFor["upc.inf.cfi.sod"]; !ok {
+		t.Errorf("include_ccr=true should populate IncludeCCRFor")
+	}
+	if _, ok := out.IncludeCCRFor["de.inf.lg.erwidg"]; ok {
+		t.Errorf("include_ccr=false should NOT populate IncludeCCRFor")
+	}
+}
+
+func TestToCalcOptionsAddendum_EmptyInput(t *testing.T) {
+	out := ToCalcOptionsAddendum(nil)
+	if out.PerCardAppellant == nil || out.SkipRules == nil || out.IncludeCCRFor == nil {
+		t.Errorf("empty input should still produce non-nil maps for safe indexing")
+	}
+	if len(out.PerCardAppellant) != 0 || len(out.SkipRules) != 0 || len(out.IncludeCCRFor) != 0 {
+		t.Errorf("empty input should produce empty maps")
+	}
+}

internal/services/fristenrechner.go

@@ -90,6 +90,18 @@ type UIDeadline struct {
 	// court itself.
 	IsCourtSetIndirect bool `json:"isCourtSetIndirect,omitempty"`
 	IsOverridden     bool              `json:"isOverridden,omitempty"`
+	// ChoicesOffered surfaces paliad.deadline_rules.choices_offered for
+	// the rule so the frontend knows whether to render the per-event-card
+	// caret affordance, and which choice-kinds to populate the popover
+	// with. NULL / empty for rules with no choices. (t-paliad-265)
+	ChoicesOffered json.RawMessage `json:"choicesOffered,omitempty"`
+	// AppellantContext is the per-decision appellant pick that applies
+	// to descendants of the closest ancestor decision card with a
+	// PerCardAppellant set. Empty when no per-card override is in
+	// effect (page-level ?appellant= still applies in that case).
+	// Frontend bucketer prefers this over the page-level appellant when
+	// non-empty. (t-paliad-265)
+	AppellantContext string `json:"appellantContext,omitempty"`
 }
 
 // UIResponse matches the frontend's DeadlineResponse TypeScript interface.
@@ -179,6 +191,29 @@ type CalcOptions struct {
 	// Empty / nil = no override (default). Overrides apply equally to
 	// the proceeding-tree and trigger-event branches.
 	RuleOverrides []models.DeadlineRule
+
+	// Per-event-card choice overlays (t-paliad-265 / m/paliad#96).
+	// Keyed by paliad.deadline_rules.submission_code — same key
+	// AnchorOverrides uses.
+	//
+	//   - PerCardAppellant: maps a decision-card's submission_code to the
+	//     user-picked appellant ("claimant"|"defendant"|"both"|"none").
+	//     The engine walks the parent chain of each rule and stamps the
+	//     resulting UIDeadline.AppellantContext from the closest ancestor
+	//     decision with a pick. The frontend bucketer then prefers the
+	//     per-rule context over the page-level appellant.
+	//   - SkipRules: set of submission_code values whose rules (and any
+	//     descendants) the user has opted out of for this projection.
+	//     Same suppression path as a failed condition_expr gate.
+	//   - IncludeCCRFor: set of submission_code values for rules where
+	//     the user opted in to the include-CCR choice (Klageerwiderung
+	//     cards). v1 simplification (design §4.2 #2): if non-empty,
+	//     "with_ccr" is appended to the flag set before gate
+	//     evaluation. Correct for single-CCR-entry-point proceedings
+	//     (UPC INF + DE LG today). Multi-CCR scope is a future expansion.
+	PerCardAppellant map[string]string
+	SkipRules        map[string]struct{}
+	IncludeCCRFor    map[string]struct{}
 }
 
 // Calculate renders the full UI timeline for a proceeding type + trigger date.
@@ -233,6 +268,14 @@ func (s *FristenrechnerService) Calculate(ctx context.Context, proceedingCode, t
 	for _, f := range opts.Flags {
 		flagSet[f] = struct{}{}
 	}
+	// v1 simplification (design §4.2 #2, t-paliad-265): when any
+	// IncludeCCRFor entry exists, we treat with_ccr as set in the flag
+	// context. Correct for single-CCR-entry-point proceedings (UPC INF +
+	// DE LG today). Multi-CCR scope is a future expansion that would
+	// thread the include set through the gate evaluator per-rule.
+	if len(opts.IncludeCCRFor) > 0 {
+		flagSet["with_ccr"] = struct{}{}
+	}
 
 	// Parse anchor overrides up-front so a malformed date errors out
 	// before we start walking rules.
@@ -329,6 +372,21 @@ func (s *FristenrechnerService) Calculate(ctx context.Context, proceedingCode, t
 	courtSet := make(map[uuid.UUID]bool, len(rules))
 	deadlines := make([]UIDeadline, 0, len(rules))
 
+	// Per-event-card overlays (t-paliad-265). Empty/nil maps are safe
+	// for membership tests; the engine reads them but doesn't mutate.
+	skipRules := opts.SkipRules
+	perCardAppellant := opts.PerCardAppellant
+	// skippedIDs accumulates the set of rule UUIDs whose timeline entry
+	// the user has opted out of. Walking in sequence_order means a
+	// child rule's parent has already been classified — so descendant
+	// suppression is a one-pass parent_id lookup.
+	skippedIDs := make(map[uuid.UUID]struct{}, len(skipRules))
+	// appellantContext maps a rule UUID to the appellant value that
+	// applies to its descendants. A rule that has its own PerCardAppellant
+	// pick stamps itself with that value; a rule whose parent has a
+	// context inherits it.
+	appellantContext := make(map[uuid.UUID]string, len(rules))
+
 	for _, r := range rules {
 		// Phase-3 unified gate: evaluate condition_expr (jsonb).
 		// Suppression semantic preserved: when the gate fires false AND
@@ -341,12 +399,49 @@ func (s *FristenrechnerService) Calculate(ctx context.Context, proceedingCode, t
 			continue
 		}
 
+		// SkipRules suppression (t-paliad-265): the user has marked
+		// this rule (or one of its ancestors) as "don't consider for
+		// this case". Drop the row entirely AND record the rule ID so
+		// descendants suppress too.
+		if r.SubmissionCode != nil {
+			if _, skipped := skipRules[*r.SubmissionCode]; skipped {
+				skippedIDs[r.ID] = struct{}{}
+				continue
+			}
+		}
+		if r.ParentID != nil {
+			if _, parentSkipped := skippedIDs[*r.ParentID]; parentSkipped {
+				skippedIDs[r.ID] = struct{}{}
+				continue
+			}
+		}
+
+		// AppellantContext propagation. A rule with its own PerCardAppellant
+		// pick stamps its UUID with that value. Otherwise inherit from
+		// parent if the parent had a context.
+		var ctxVal string
+		if r.SubmissionCode != nil {
+			if v, ok := perCardAppellant[*r.SubmissionCode]; ok {
+				ctxVal = v
+			}
+		}
+		if ctxVal == "" && r.ParentID != nil {
+			if v, ok := appellantContext[*r.ParentID]; ok {
+				ctxVal = v
+			}
+		}
+		if ctxVal != "" {
+			appellantContext[r.ID] = ctxVal
+		}
+
 		d := UIDeadline{
-			RuleID:        r.ID.String(),
-			Name:          r.Name,
-			NameEN:        r.NameEN,
-			Priority:      r.Priority,
-			ConditionExpr: json.RawMessage(r.ConditionExpr),
+			RuleID:           r.ID.String(),
+			Name:             r.Name,
+			NameEN:           r.NameEN,
+			Priority:         r.Priority,
+			ConditionExpr:    json.RawMessage(r.ConditionExpr),
+			AppellantContext: ctxVal,
+			ChoicesOffered:   json.RawMessage(r.ChoicesOffered),
 		}
 		if r.SubmissionCode != nil {
 			d.Code = *r.SubmissionCode