# Design — Submission generator (t-paliad-215)

**Author:** copernicus (inventor)
**Date:** 2026-05-19
**Issue:** m/paliad (task t-paliad-215, no Gitea issue filed yet)
**Branch:** `mai/copernicus/inventor-submission`
**Status:** DESIGN READY FOR REVIEW

---

## §0 TL;DR

Each row in `paliad.deadline_rules` represents a SUBMISSION — a filing,
hearing, or decision inside a proceeding (`submission_code` shape
`de.inf.lg.erwidg`, `upc.inf.cfi.soc`, …). The submission generator
takes a project + a submission_code, pulls a `.docx` template from
Gitea, merges in project variables (party names, court, case number,
patent number, our_side, deadline date, legal_source citation, firm
header), and streams the result to the browser as a download.

- **Scope (locked by m):** template-render to `.docx`. No LLM in v1.
- **Template registry (locked):** Gitea — same proxy pattern as the
  existing HL Patents Style `.dotm` in `internal/handlers/files.go`.
- **Output (locked):** direct download, NO server-side binary
  persistence. One audit row per generation; the bytes themselves are
  regenerable from inputs on demand.
- **Lookup (locked):** fallback chain — firm-specific override →
  base for the exact `submission_code` → generic for the proceeding
  family → ultra-generic skeleton.
- **Slice 1 (locked):** one template, end-to-end, on one project.
  Pick `de.inf.lg.erwidg` (Klageerwiderung) as the proof template.
- **AI-drafted body:** explicitly OUT of scope for this task. Lives
  in §11 as a follow-up sketch only.

This design is read-only. No code, no migrations, no schema
additions. Implementation gate is m's go/no-go on this doc.

---

## §1 Premises verified live (2026-05-19)

Anchored against the running paliad codebase + youpc Supabase, not
against CLAUDE.md or memory. Where a claim load-bears the design, it
was checked against the live system.

| Claim | Verification |
|---|---|
| Migration tracker at **102** (next is 103) | `ls internal/db/migrations/` — `102_system_audit_log` is the latest applied. |
| `paliad.documents` table exists, is empty, no code writes to it yet | `SELECT COUNT(*) FROM paliad.documents` → 0 rows. Columns: `id, title, doc_type, file_path NULLABLE, file_size, mime_type, ai_extracted jsonb, uploaded_by, created_at, updated_at, project_id NOT NULL`. `grep` shows only `export_service.go` (audit-export only) and a comment in `render_spec.go`. No `document_service.go`, no `/api/documents` handler. |
| `paliad.deadline_rules` carries the submission corpus | 254 total rows, 158 unique `submission_code`s, 214 `published`. Per-row fields used by the generator: `name`, `name_en`, `submission_code`, `primary_party` (claimant/defendant/court/both), `event_type` (filing/hearing/decision), `legal_source` (e.g. `DE.ZPO.276.1`, `UPC.RoP.23.1`), `is_bilateral`. |
| Slice 1 target row exists in published state | `SELECT … WHERE submission_code='de.inf.lg.erwidg'` → `{name:"Klageerwiderung", name_en:"Statement of Defence", primary_party:"defendant", legal_source:"DE.ZPO.276.1"}`. |
| Project rows carry all variables we need to merge | `paliad.projects` has `case_number, court, patent_number, filing_date, grant_date, our_side, instance_level, proceeding_type_id, title, reference, client_number, matter_number`. |
| Party rows carry party variables | `paliad.parties` has `name, role, representative, contact_info jsonb` and is project-scoped via `project_id`. |
| The HL Patents Style proxy pattern is reusable | `internal/handlers/files.go`: `fileRegistry` map → Gitea raw URL + SHA-based cache + 5-min refresh check + binary download response with `Content-Disposition`. Cache is in-process (`sync.Mutex` over a `map[string]*cacheEntry`). Single web replica today (`docker-compose.yml`), so in-process cache is fine. |
| Email templates already use `{{.VarName}}` placeholders + a "variable contract" sidebar pattern | `internal/services/email_template_variables.go` — `EmailTemplateVariable{Name, Type, Description, SampleDE, SampleEN}` rendered in `/admin/email-templates`. Submission generator can copy this contract pattern. |
| Audit infrastructure landed in mig 102 | `paliad.system_audit_log(id, event_type, actor_id, actor_email, scope, scope_root, metadata jsonb, created_at, updated_at)` — submission_generated events slot straight in. |
| Branding source is `internal/branding.Name` | Default `"HLC"`, overridable via `FIRM_NAME`. Inlined into client bundles by `frontend/build.ts`. Submission templates honour this via the `{{firm.name}}` placeholder. |
| `paliad.can_see_project(project_id)` is the canonical visibility predicate | mig 055; `internal/services/visibility.go` mirrors it. Generator gates on this; no new auth surface. |
| Paliadin runs on the aichat backend (mRiver) with persona system | `internal/services/aichat_paliadin.go` + `personas.yaml` in `m/mAi/internal/aichat/persona/`. Owner-gated to `PaliadinOwnerEmail = matthias.siebels@hoganlovells.com`. A future AI-drafted body would be a new persona, not a new Go service. |

**Doc-vs-live conflicts found:** none material for this design.
`docs/project-status.md` still lists "Phase H AI Frist-Extraktion
deferred" — this design does NOT revive Phase H (different surface;
this is template merge, not document understanding).

---

## §2 m's decisions (2026-05-19)

Locked via AskUserQuestion before drafting the rest of the design.

| # | Question | m's pick | Inventor recommended? |
|---|---|---|---|
| Q1 | Generator scope (template / AI-draft / brief / other) | **Template-render to `.docx`** | ✅ yes |
| Q2 | Template registry (Gitea / paliad DB / hybrid) | **Gitea** | ✅ yes |
| Q3 | Output flow (download-only / persist binary / attach to Frist) | **Direct download, no server-side binary** | ✅ yes |
| Q4 | Mapping (fallback chain / 1:1 / 1:N user picks) | **Fallback chain** | ✅ yes |
| Q5 | Slice 1 scope (1 template / 3–5 templates / full corpus / skeleton-only) | **One template, end-to-end on one project** (`de.inf.lg.erwidg` Klageerwiderung) | ✅ yes |

Inventor-defaulted (not asked because there's a clear right answer or
because the question is implementation-level, not architecture-level):

| # | Topic | Default | Reasoning |
|---|---|---|---|
| D1 | Variable engine | `{{path.dot.notation}}` placeholders in the .docx body, replaced via a Go library that handles run-fragmentation | Matches the existing email-template `{{.Var}}` shape lawyers already see in `/admin/email-templates`. See §6. |
| D2 | Authorization | Project-team visibility only (`paliad.can_see_project`) + audit row | Matches every other write surface in paliad. No profession floor (generation is read-only on source data and produces a draft, not a binding action). |
| D3 | Naming convention | `{rule.name}-{project.case_number}-{YYYY-MM-DD}.docx`, slashes → underscores, FIRM_NAME-aware | Mirrors how lawyers name files manually. See §7. |
| D4 | Missing-variable behaviour | Render `[KEIN WERT: {field}]` / `[NO VALUE: {field}]` marker inline | Lets the lawyer see the gap in Word, fix in paliad, regenerate. Better than 400ing. |
| D5 | Editor surface | Gitea-only for v1 (admin edits .docx in Word, commits to mWorkRepo) | A paliad uploader UI is Phase 2 affordance if Gitea round-trip is painful. |
| D6 | AI-drafted body | OUT of scope for this task | §11 sketches the natural follow-up shape (new aichat persona) but does not commit to it. |

---

## §3 Architecture overview

```
┌────────────────────────────────────────────────────────────────────────┐
│ Project detail page                                                    │
│  ├─ "Submissions" panel (or button row)                                │
│  │     [Generate Klageerwiderung] [Generate Klageerhebung] [...]      │
│  │     Each button enabled iff a template exists for that             │
│  │     submission_code AND user passes paliad.can_see_project.        │
│  └─ Click → POST /api/projects/{id}/submissions/{code}/generate       │
└──────────────────────────────────┬─────────────────────────────────────┘
                                   │
                                   ▼
┌────────────────────────────────────────────────────────────────────────┐
│ handlers/submissions.go (NEW)                                           │
│   1. Auth: UserIDFromContext + can_see_project gate                    │
│   2. Load deadline_rule by submission_code                             │
│   3. Resolve template via fallback chain (TemplateRegistry)            │
│   4. Build variable bag (services/submission_vars.go)                  │
│   5. Render via SubmissionRenderer (services/submission_render.go)     │
│   6. Write paliad.documents audit row (NO file_path)                   │
│   7. Write paliad.system_audit_log entry (event_type=                  │
│      'submission.generated')                                            │
│   8. Stream .docx bytes with Content-Disposition: attachment           │
└──────────────────────────────────┬─────────────────────────────────────┘
                                   │ (template fetch)
                                   ▼
┌────────────────────────────────────────────────────────────────────────┐
│ TemplateRegistry (services/submission_templates.go) — NEW              │
│   • In-process cache (same shape as handlers/files.go cacheEntry)      │
│   • Lookup path:                                                        │
│       (1) templates/{FIRM_NAME}/{submission_code}.docx                  │
│       (2) templates/_base/{submission_code}.docx                        │
│       (3) templates/_base/{proceeding_family}.docx (e.g. upc.inf.cfi)  │
│       (4) templates/_base/_skeleton.docx                                │
│   • Fetched from m/mWorkRepo via Gitea raw URL                         │
│   • 5-min SHA refresh check (identical pattern to files.go)            │
└──────────────────────────────────┬─────────────────────────────────────┘
                                   │
                                   ▼
                            Gitea: m/mWorkRepo
                              templates/HLC/de.inf.lg.erwidg.docx
                              templates/_base/de.inf.lg.erwidg.docx
                              templates/_base/de.inf.lg.docx
                              templates/_base/_skeleton.docx
```

**No new tables.** `paliad.documents` already exists; we write audit
rows there but leave `file_path` NULL. The fallback chain uses
filesystem-style paths inside the existing Gitea repo; no
`submission_templates` table needed for Slice 1.

---

## §4 Slice 1 — what ships first

Locked by Q5: **one template, end-to-end, on one project.**

### 4.1 Target submission

**`de.inf.lg.erwidg`** — Klageerwiderung (DE Verletzungs-LG).
Reasoning:

- High-frequency submission in patent practice; lawyers draft these
  often enough that the tool earns its keep on day 1.
- `primary_party='defendant'` — exercises the our_side variable.
- `legal_source='DE.ZPO.276.1'` — exercises citation injection.
- Pure-DE (no UPC complexity); easier first template for HLC's
  Munich/Düsseldorf practice to author and review.
- Klageerhebung (`de.inf.lg.klage`) is an obvious alternative; either
  works. m can flip the target in his decision review if Klageerhebung
  is the better proof case.

### 4.2 Surfaces in Slice 1

- **Project detail page** — new "Submissions" panel listing every
  submission_code from the project's `proceeding_type` (via existing
  `DeadlineRuleService`) with a `[Generieren]` button per row. Button
  is enabled iff a template resolves AND `event_type='filing'` (no
  `[Generieren]` on hearings/decisions — those don't have submissions).
- **Project detail API** — `GET /api/projects/{id}/submissions` returns
  the list of (submission_code, name, has_template) so the frontend
  can render enabled/disabled state.
- **Generate endpoint** — `POST /api/projects/{id}/submissions/{code}/generate`
  returns `application/vnd.openxmlformats-officedocument.wordprocessingml.document`
  with `Content-Disposition: attachment; filename="..."`.

Slice 1 does NOT add:

- A `/admin/submission-templates` editor (Gitea is the editor).
- A Frist-detail "Generate" button (project-detail only in Slice 1;
  Frist-level surface is a Slice 2 affordance).
- A "Submissions" tab as a dedicated page (project-detail panel only).
- Per-firm overrides beyond `templates/HLC/...` (the fallback chain is
  WIRED but the only override directory exercised in Slice 1 is HLC).
- The variable-contract sidebar UI (mirrors email-template editor) —
  the contract is documented in §6 as code constants, surfaced as a
  Slice 2 admin affordance.

### 4.3 Slice 1 LoC estimate (informational, no time estimate)

| File | Approx |
|---|---|
| `internal/handlers/submissions.go` (NEW) | 180 |
| `internal/services/submission_templates.go` (NEW — registry + Gitea proxy, reuses files.go cache idea) | 200 |
| `internal/services/submission_vars.go` (NEW — variable bag builder) | 220 |
| `internal/services/submission_render.go` (NEW — docx merge engine wrapper) | 120 |
| `internal/services/submission_render_test.go` (placeholder coverage + missing-var marker) | 180 |
| `frontend/src/components/SubmissionsPanel.tsx` (NEW) | 80 |
| `frontend/src/client/submissions.ts` (NEW — fetch + download) | 60 |
| Wiring in `cmd/server/main.go` + `internal/handlers/handlers.go` | 30 |
| i18n keys (`submissions.*`) DE+EN | 20 |
| **Total** | **~1090 LoC** |

Plus: ONE `.docx` template authored by HLC at
`m/mWorkRepo/templates/HLC/de.inf.lg.erwidg.docx`, lawyer-reviewed
before Slice 1 closes.

---

## §5 Template registry (Gitea-backed)

### 5.1 Gitea layout

```
m/mWorkRepo (existing repo)
└── templates/
    ├── HLC/                              # FIRM_NAME-keyed override dir
    │   └── de.inf.lg.erwidg.docx        # Slice 1 ships THIS file
    ├── _base/                            # Cross-firm baseline
    │   ├── de.inf.lg.erwidg.docx        # (Phase 2+)
    │   ├── de.inf.lg.docx                # proceeding-family fallback
    │   ├── upc.inf.cfi.docx              # (Phase 2+)
    │   └── _skeleton.docx                # ultra-generic fallback
    └── README.md                         # placeholder reference for authors
```

Naming convention is the submission_code with a `.docx` suffix.
Proceeding-family fallback is the submission_code's first two
dot-segments (`de.inf.lg` from `de.inf.lg.erwidg`).

### 5.2 Lookup algorithm

```go
// services/submission_templates.go
func (r *TemplateRegistry) Resolve(ctx context.Context, code string) (Template, error) {
    firm := branding.Name                 // "HLC", or whatever FIRM_NAME is
    family := familyOf(code)              // "de.inf.lg" from "de.inf.lg.erwidg"
    candidates := []string{
        fmt.Sprintf("templates/%s/%s.docx", firm, code),
        fmt.Sprintf("templates/_base/%s.docx", code),
        fmt.Sprintf("templates/_base/%s.docx", family),
        "templates/_base/_skeleton.docx",
    }
    for _, path := range candidates {
        if tmpl, ok := r.fetch(ctx, path); ok {
            return tmpl, nil
        }
    }
    return Template{}, ErrNoTemplate
}
```

`fetch` does the same SHA-cache dance `handlers/files.go` already
does, scoped to the templates subtree.

### 5.3 Gitea auth

Reuses `GITEA_TOKEN` env var that already exists for the HL Patents
Style proxy. `m/mWorkRepo` is the same repo, same access token. No
new secret to configure.

### 5.4 What happens when no template resolves

The fallback chain ends at `_skeleton.docx`. The skeleton is an
intentionally bare-bones .docx (firm letterhead + party block + court
address + case number + signature stub) that ships as part of the
initial template set. In practice every Generate request resolves to
something — but if even the skeleton 404s (misconfigured repo), the
generator returns `503` with a clear error, the SubmissionsPanel
button surfaces "Vorlagen-Repository nicht erreichbar".

---

## §6 Variable interpolation

### 6.1 Engine

Plain text replacement of `{{path.dot.notation}}` placeholders in the
.docx body. Whitespace inside braces is trimmed
(`{{ project.case_number }}` ≡ `{{project.case_number}}`).

Implementation: a Go library that handles Word's run-fragmentation
correctly (Word may split `{{project.case_number}}` across multiple
`<w:r>` runs during editing; naive find/replace breaks). Candidates:

- **`github.com/lukasjarosch/go-docx`** (~2k stars, MIT, pure Go,
  maintained). Handles run-merging before replacement. **Inventor
  recommendation.**
- `github.com/nguyenthenguyen/docx` — older, less active.
- Custom in-house implementation — ~200 LoC for a minimal robust
  replacer that walks the document XML and merges runs that fall
  inside a `{{…}}` span. Fallback if the library doesn't pan out.

Slice 1: try `lukasjarosch/go-docx` first; if it has dealbreaker bugs
(e.g. blows up on Word's autocorrect runs), fall back to the in-house
~200 LoC walker. The library choice is an implementation detail; the
placeholder syntax stays the same either way.

### 6.2 Variable contract (v1 placeholder set)

```
{{firm.name}}                        — HLC (or whatever FIRM_NAME is)
{{firm.signature_block}}             — Phase 2; v1 renders empty string

{{today}}                            — 2026-05-19 (ISO)
{{today.long_de}}                    — "19. Mai 2026"
{{today.long_en}}                    — "19 May 2026"

{{user.display_name}}                — "Maria Schmidt"
{{user.email}}                       — "maria.schmidt@hlc.com"
{{user.office}}                      — "Munich"

{{project.title}}                    — paliad.projects.title
{{project.reference}}                — paliad.projects.reference
{{project.case_number}}              — paliad.projects.case_number
{{project.court}}                    — paliad.projects.court
{{project.patent_number}}            — paliad.projects.patent_number
{{project.filing_date}}              — ISO date
{{project.grant_date}}               — ISO date
{{project.our_side}}                 — "claimant" | "defendant"
{{project.our_side_de}}              — "Klägerin" | "Beklagte"
{{project.instance_level}}           — "lg" | "olg" | "bgh" | ...
{{project.proceeding.code}}          — e.g. "de.inf.lg"
{{project.proceeding.name}}          — Verletzungsklage am Landgericht
{{project.client_number}}            — paliad.projects.client_number
{{project.matter_number}}            — paliad.projects.matter_number

{{parties.claimant.name}}            — first paliad.parties row with role='claimant'
{{parties.claimant.representative}}  — paliad.parties.representative
{{parties.defendant.name}}           — first row with role='defendant'
{{parties.defendant.representative}} — paliad.parties.representative
{{parties.other.name}}               — first row with role NOT IN ('claimant','defendant') — court, intervener, etc.

{{rule.submission_code}}             — "de.inf.lg.erwidg"
{{rule.name}}                        — "Klageerwiderung"
{{rule.name_en}}                     — "Statement of Defence"
{{rule.legal_source}}                — "DE.ZPO.276.1"
{{rule.legal_source_pretty}}         — "§ 276 Abs. 1 ZPO"
{{rule.primary_party}}               — "defendant"
{{rule.event_type}}                  — "filing"

{{deadline.due_date}}                — date of the next pending deadline for this rule on this project
{{deadline.due_date_long_de}}        — "26. Juni 2026"
{{deadline.computed_from}}           — anchor description (e.g. "Klageerhebung am 12.05.2026 +6 Wochen")
```

Per-firm extensions (e.g. `{{firm.signature_block}}` filled from a
table) are Phase 2.

### 6.3 Variable bag construction

`services/submission_vars.go` builds a flat `map[string]string`
keyed by the dotted-path placeholders above. One pass over:

1. `branding.Name` for `{{firm.*}}`
2. `time.Now()` (with `Europe/Berlin` locale for the long forms) for
   `{{today.*}}`
3. `userService.GetByID()` for `{{user.*}}`
4. `projectService.GetByID()` for `{{project.*}}`
5. `partyService.ListByProject()` for `{{parties.*}}`
6. `deadlineRuleService.GetByCode()` for `{{rule.*}}`
7. `deadlineService.NextByRuleOnProject()` for `{{deadline.*}}`

Missing values render as `[KEIN WERT: {dotted.path}]` (DE) or
`[NO VALUE: {dotted.path}]` (EN) based on user locale. This is by
design — the lawyer sees the gap in Word, fixes it (either in Word
or in paliad and regenerates), rather than getting a 400 with a list
of missing fields they then have to chase.

### 6.4 Pretty-printing the legal_source

`legal_source` in the rule corpus is shorthand
(`DE.ZPO.276.1`, `UPC.RoP.23.1`). Lawyers don't want that in a brief;
they want `§ 276 Abs. 1 ZPO` or `Rule 23.1 RoP UPC`.

Slice 1 ships a small pretty-printer (`legalSourcePretty`) that knows
the families we currently use:

| Prefix | Pretty form (DE) | Pretty form (EN) |
|---|---|---|
| `DE.ZPO.<§>.<Abs>` | `§ <§> Abs. <Abs> ZPO` | `Section <§>(<Abs>) ZPO` |
| `DE.ZPO.<§>` | `§ <§> ZPO` | `Section <§> ZPO` |
| `UPC.RoP.<Rule>.<Sub>` | `Regel <Rule>.<Sub> VerfO UPC` | `Rule <Rule>.<Sub> RoP UPC` |
| `UPC.RoP.<Rule>` | `Regel <Rule> VerfO UPC` | `Rule <Rule> RoP UPC` |
| `DE.PatG.<§>` | `§ <§> PatG` | `Section <§> PatG` |
| `EPC.<Art>` | `Art. <Art> EPÜ` | `Art. <Art> EPC` |
| (unknown) | original string | original string |

Unrecognised prefixes pass through unchanged (better than an
incorrect prettification). The function is pure and unit-tested.

---

## §7 File naming

Generated file name:

```
{rule.name}-{project.case_number}-{YYYY-MM-DD}.docx
```

Concrete example for the Slice 1 happy path:

```
Klageerwiderung-2 O 123_25-2026-05-19.docx
```

Rules:

- `rule.name` honours user locale (`Klageerwiderung` for DE,
  `Statement of Defence` for EN).
- `project.case_number` slash/backslash → underscore (Word file name
  hygiene), other characters preserved.
- Date is ISO at server-local (`Europe/Berlin`) date.
- If `project.case_number` is empty → fall back to a short hash of
  `project_id` (8 hex chars) so the file still has a stable identifier
  the lawyer can rename without losing track.

---

## §8 Authorization

- **Visibility gate:** `paliad.can_see_project(project_id)` — anyone
  who can see the project can generate. Matches every other write
  surface on the project. The endpoint inlines the predicate;
  unauthorised callers get 404 (not 403, to avoid project
  enumeration).
- **No profession floor.** A paralegal can generate a draft of a
  Klageerwiderung; the draft is a Word doc that needs the associate's
  approval downstream (in Word, on the document itself). Adding an
  approval gate on generation would slow the workflow without
  preventing anything that paliad's existing approval system doesn't
  already cover at the substantive-act layer.
- **Owner gate (Paliadin) does NOT apply.** This is the
  submission-template engine, not Paliadin. All paliad users get the
  feature once a template exists for the proceeding their project is
  in.

---

## §9 Audit trail

Two records per generation:

### 9.1 `paliad.documents` row (audit-only, no binary)

```sql
INSERT INTO paliad.documents (id, title, doc_type, file_path, file_size,
                              mime_type, ai_extracted, uploaded_by,
                              project_id)
VALUES (gen_random_uuid(),
        '{rule.name} (generiert {YYYY-MM-DD})',
        'generated_submission',           -- new doc_type value
        NULL,                              -- no on-disk path
        NULL,                              -- no file size (binary not persisted)
        'application/vnd.openxmlformats-officedocument.wordprocessingml.document',
        jsonb_build_object(
            'submission_code', $1,
            'template_path',  $2,         -- the gitea path we resolved
            'template_sha',   $3,         -- pinned SHA from the cache fetch
            'firm',           $4),
        $user_id,
        $project_id);
```

- `doc_type='generated_submission'` is a new value; no CHECK constraint
  on doc_type today so this is additive.
- `file_path NULL` is the marker that says "regenerate from inputs on
  demand". The /api/projects/{id}/documents listing UI (Phase 2) will
  surface a `[Erneut generieren]` action for these rows.
- `ai_extracted` jsonb is repurposed for generation provenance
  (template SHA, firm at time of generation). Naming is unfortunate
  but the column shape fits; renaming the column is out of scope for
  this task.

### 9.2 `paliad.system_audit_log` row

```sql
INSERT INTO paliad.system_audit_log (event_type, actor_id, actor_email,
                                     scope, scope_root, metadata)
VALUES ('submission.generated',
        $user_id,
        $user_email,
        'project',
        $project_id::text,
        jsonb_build_object(
            'submission_code', $1,
            'template_path',  $2,
            'template_sha',   $3,
            'document_id',    $document_id,
            'firm',           $4));
```

Mirrors the existing `system_audit_log` event_type convention
(`*.created`, `*.updated`, etc., from t-paliad-214).

### 9.3 Verlauf entry (project event)

`paliad.project_events` gets a row with `event_type='submission_generated'`
and `timeline_kind='custom_milestone'` so the generation surfaces in
SmartTimeline's audit-log toggle and on the project's Verlauf list.
This is the user-visible footprint; the `system_audit_log` entry is
the admin-visible audit footprint.

---

## §10 Frontend surface

### 10.1 Slice 1 — SubmissionsPanel on project detail

A new panel below the existing Verlauf / Deadlines panels on
`/projects/{id}`:

```
┌─────────────────────────────────────────────────────────────────┐
│ Schriftsätze                                                    │
├─────────────────────────────────────────────────────────────────┤
│ Klageerhebung                          [— Vorlage fehlt]        │
│ Klageerwiderung                        [Generieren ↓]            │
│ Replik                                 [— Vorlage fehlt]        │
│ Duplik                                 [— Vorlage fehlt]        │
└─────────────────────────────────────────────────────────────────┘
```

- Filter: only `event_type='filing'` rules from the project's
  `proceeding_type` are listed. Hearings and decisions don't have
  submissions.
- Per-row state: `has_template` returned by
  `GET /api/projects/{id}/submissions`. Disabled buttons show the
  "Vorlage fehlt" hint (German default, English in EN locale).
- Click `[Generieren ↓]` → POST → browser triggers download.
- `aria-busy="true"` on the panel while a generation is in flight
  (cheap, but lawyers feel slow networks).

### 10.2 Out of scope for Slice 1

- A standalone `/submissions` index page.
- A Frist-detail "Generate" button.
- A picker for template variants (1:N) — locked to fallback chain
  (Q4), which is 1:1 from the user's perspective.
- An "edit project, then regenerate" loop on the same UI.

---

## §11 AI-drafted body (deferred — sketch only)

NOT in scope for t-paliad-215. Documented here so the next inventor
picking up the "AI Klageerwiderung body" task has a clear starting
shape.

The natural fit: a new aichat persona (e.g. `paliadin-draft`) on
mRiver, parallel to the existing `paliadin` persona.

```
{{ai.draft_body}}    # placeholder in the template

→ generator detects {{ai.*}} placeholders in the template
→ POSTs to aichat with persona=paliadin-draft + context:
    - project state (variables already built)
    - relevant project notes (paliad.notes)
    - the deadline_rule corpus (rule + family)
    - HL Patents Style guide chunks (RAG, eventually)
→ aichat returns Markdown body
→ generator injects into the .docx as one or more <w:p> paragraphs
  (Word-friendly Markdown → docx mapping needed; substantive
  formatting question for that follow-up)
```

Open shape questions for that follow-up (NOT for this design):

- One persona per submission type, or one persona that branches on
  `submission_code` in its system prompt?
- Owner gate (m only) like current paliadin, or open to all
  authenticated users?
- Approval gate before the AI body lands in the .docx?
- Cost accounting per generation?
- Where does the prose context come from (notes / uploaded patent
  spec / prior pleadings)?

Re-uses, when that task fires:

- This task's template engine, variable contract, fallback chain,
  audit trail — all unchanged.
- Just a new placeholder family (`{{ai.*}}`) + a new aichat persona +
  a new admin gate.

---

## §12 Slice plan beyond Slice 1

| Slice | Scope |
|---|---|
| 1 | One template (`de.inf.lg.erwidg`), engine + fallback chain + audit + SubmissionsPanel on project detail. THIS DESIGN. |
| 2 | 3–5 more templates (Klageerhebung, SoC `upc.inf.cfi.soc`, SoD `upc.inf.cfi.sod`, Berufungsbegründung `de.inf.olg.begruendung`). Template authoring effort, no new architecture. |
| 3 | Variable-contract sidebar in a new `/admin/submission-templates` page (mirrors `/admin/email-templates` shape). Shows what placeholders exist, with samples. Does NOT add an uploader UI — Gitea remains the editor. |
| 4 | Per-firm override directory exercised (first non-HLC firm onboarded). |
| 5 | Frist-detail "Generate" button + paliad.documents.deadline_id FK (mig 103+) for per-Frist draft history. |
| 6 | (Separate task) AI-drafted body via Paliadin persona — see §11. |
| 7 | (Future) Paliad UI uploader as alternative to Gitea, if the round-trip is friction. |

Slices 2–5 are roadmap markers, not commitments — m decides cadence.

---

## §13 Trade-offs flagged

1. **No binary persistence is a deliberate retention choice.** If a
   lawyer regenerates after the project state changes (party renamed,
   case_number corrected), the "regenerated" doc differs from the
   "original generated" doc. This is a feature, not a bug — the source
   of truth is paliad's project state, and the .docx is a derivative.
   But the lawyer needs to be aware: there is no "what did I generate
   last Thursday" recovery without re-saving locally. The
   `paliad.documents` audit row records WHAT was generated (template
   SHA + project state hash, optionally), but not the bytes.

2. **Gitea round-trip for template edits is friction.** Template
   authors edit `.docx` in Word, save, drag to Gitea web UI (or push
   from a local clone). The 5-min SHA cache means edits surface
   within 5 minutes (or instantly via `POST /api/files/refresh` —
   already wired for the HL Patents Style template). If lawyers
   complain, Phase 7 adds an in-paliad uploader. Until then, Gitea is
   the editor.

3. **Variable contract changes are coordinated edits.** Adding a new
   `{{project.*}}` placeholder needs both a code change (var bag) AND
   template edits (templates won't auto-discover new placeholders).
   The variable-contract sidebar (Slice 3) is the mitigation —
   template authors see what's available without reading the Go code.

4. **`lukasjarosch/go-docx` library risk.** ~2k stars, MIT, maintained
   — but it's a third-party dep we haven't used before. Fallback is
   the in-house ~200-LoC walker. The placeholder syntax doesn't change
   either way; Slice 1 can swap engines without touching templates or
   callers.

5. **`paliad.documents.ai_extracted` is repurposed for generation
   provenance.** Slightly ugly naming because the column was added for
   Phase H (AI Frist-Extraktion), which never shipped. Renaming the
   column to something like `metadata` is out of scope for this task
   but should be folded into the migration that lands when Phase 5
   adds `deadline_id`.

6. **`paliad.parties.role='claimant'`** — multiple claimants on a
   project (multi-party suit) → Slice 1 picks the first row. v1
   shortcut. Templates needing multi-claimant blocks become Phase 2
   work (with a `{{#each parties.claimants}}` shape on top of
   `lukasjarosch/go-docx`'s loop support).

7. **No Word-side `MERGEFIELD` support.** Lawyers who insert Word
   merge fields (via Insert → Quick Parts → Field) instead of typing
   `{{…}}` will get untouched MERGEFIELD codes in the rendered output.
   Decision: standardise on `{{…}}` syntax (cheap to type, visible
   in the template, predictable). Document this in the `templates/
   README.md`.

8. **No template versioning UI.** Gitea provides git history; that's
   the canonical version trail. Bumping to "use template X as of
   commit Y" for an old project is a manual git-checkout-and-pin
   exercise. Phase 2+ if anyone asks; not today.

---

## §14 Open follow-ups (NOT blocking)

These items are NOT m-decisions; they're follow-ups for the coder
shift or future inventor passes:

- **Template authoring effort.** Slice 1 needs HLC to author/review
  the actual Klageerwiderung template. That's a legal-review task that
  can run in parallel with the engine code (template uploaded last
  before the slice ships). Coordinate with m on who reviews.
- **English version of `legalSourcePretty`.** Pretty-printer table in
  §6.4 needs an EN column for every prefix — populated from existing
  glossary entries where possible.
- **i18n key sweep.** `submissions.*` namespace; ~20 keys for Slice 1
  (panel title, button labels, "Vorlage fehlt" hints, error messages
  for 503/404/422).
- **README for template authors.** A `templates/README.md` in
  m/mWorkRepo listing the available placeholders + naming convention
  + a screenshot of a working template. Coder ships this alongside
  Slice 1.
- **CLAUDE.md update.** Add a "Submission templates" section
  documenting the Gitea proxy, placeholder syntax, and the
  `submission.generated` audit event_type.
- **Cleanup task for `ai_extracted` naming.** Issue + Phase 5 mig.

---

## §15 What this design does NOT do

To set the scope boundary cleanly:

- ❌ Generate PDFs.
- ❌ Generate emails or any non-.docx format.
- ❌ Edit `.docx` files inside paliad (no in-browser Word editor).
- ❌ Upload .docx to NetDocuments or any external DMS.
- ❌ Translate templates DE↔EN automatically.
- ❌ Validate the generated draft against any legal rule.
- ❌ Sign, certify, or notarise the output.
- ❌ Send the draft to court / e-filing.
- ❌ AI-draft any prose. (See §11.)
- ❌ Provide a paliad-UI template editor. (Gitea is the editor.)
- ❌ Persist generated .docx bytes server-side. (Audit row only.)
- ❌ Add a new database table. (`paliad.documents` is enough for v1.)
- ❌ Require a database migration. (Slice 1 is migration-free.)

Each of these is a defensible future-scope item; none belong in
Slice 1.

---

## §16 Recommended implementer

Pattern-fluent Sonnet coder. The substrate is well-trodden:

- Gitea proxy + cache: `internal/handlers/files.go` is the template
  to lift.
- Variable contract pattern: `internal/services/email_template_variables.go`
  is the template to mirror (different surface, identical shape).
- Visibility gate: `internal/services/visibility.go` +
  `paliad.can_see_project()` — standard everywhere.
- Audit insert: `paliad.system_audit_log` (mig 102) + `paliad.documents`
  (existing table, first writer).
- Frontend SubmissionsPanel: stock TSX + client/.ts pattern, same shape
  as the existing CardLayout / EventsList panels.

The only novel piece is the docx merge library integration — that's a
~200 LoC isolated module the coder can prototype on a sample .docx
before wiring into the project flow.

NOT cronus per project memory directive.

---

## §17 Acceptance criteria for Slice 1

The coder considers Slice 1 done when:

1. Pushing a `.docx` to `m/mWorkRepo/templates/HLC/de.inf.lg.erwidg.docx`
   and visiting any project with `proceeding_type=de.inf.lg` surfaces
   a `[Generieren]` Klageerwiderung button.
2. Clicking it downloads a `.docx` named per §7 with all §6.2
   placeholders resolved (or `[KEIN WERT: …]` markers for genuinely
   missing project fields).
3. Opening the downloaded .docx in Word renders cleanly (no run
   fragmentation artefacts, no broken styles).
4. A row appears in `paliad.documents` with `doc_type='generated_submission'`,
   `file_path=NULL`, and `ai_extracted` jsonb carrying the template
   path + SHA.
5. A row appears in `paliad.system_audit_log` with `event_type='submission.generated'`.
6. A row appears in `paliad.project_events` with
   `event_type='submission_generated'` and shows up in the project's
   Verlauf / SmartTimeline.
7. Calling the endpoint without project visibility returns 404.
8. Calling the endpoint with no template anywhere in the fallback
   chain returns 503 with a clear error.
9. Unit tests cover: placeholder rendering happy path, missing-var
   marker, fallback chain (all 4 levels), file naming, slash
   sanitization, legalSourcePretty for every prefix in §6.4.
10. `go build ./... && go vet ./... && go test ./... && bun run build`
    all clean.
11. Manual test on the live database (test admin
    `tester@hlc.de` per memory) against a project with a real
    `de.inf.lg` proceeding succeeds end-to-end.

---

## §18 Approval gate

Per inventor SKILL.md and project CLAUDE.md: this design needs m's
go/no-go before any coder is hired. After m approves:

- The head decides whether to hire the same worker as `/mai-coder`
  with this design as the brief, or a fresh coder.
- A coder shift takes this doc as the spec, ships Slice 1, opens a
  PR (no self-merge — maria's gate).
- Phase 11 (AI-drafted body) is a SEPARATE task — not auto-spawned.

Inventor parks here.
