merge: wave 1 order 2 (intent) into main

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

docs/HANDOVER-CONTRACTS.md

@@ -76,6 +76,8 @@ Every validator exposes a CLI: `node lib/validators/<name>.mjs --json <path>` re
 | `framing` | string | **required at ≥ 2.2** (v5.5) | `preserve \| refine \| replace \| new-direction` | How this brief relates to prior operator intent. Enum-checked on any version when present; missing → `BRIEF_MISSING_FRAMING` at `brief_version ≥ 2.2`. Layer 1 of the framing-alignment defense. |
 | `intent_approved_hash` | string | optional in the schema; **required by `/trekplan`** (veikart steg 1) | `"sha256:<64 hex>"` | Hash over the normalized `## Intent` + `## Goal`. Written only by `lib/validators/intent-approval.mjs --stamp`, which `/trekbrief` runs on the operator's explicit "Approve" (Phase 4h, or `--approve <project-dir \| brief-file>`). |
 | `intent_approved_at` | string | optional | ISO-8601 | When the stamp was written. Informational; the gate reads the hash. |
+| `ceremony` | string | optional (K1) | `small \| bounded \| architectural` | The brief's size class: sets `/trekbrief`'s question budget and review cap, and what downstream phases scale to. **Absent (or unreadable) = `architectural`**, the heaviest, so another producer's brief is never treated lighter by accident. Enum-checked when present (`BRIEF_INVALID_CEREMONY`). Read it through `briefCeremony(fm)` in `brief-validator.mjs`. |
+| `artifact_store` | string | optional | `git \| local` | Whether the brief and plan are committed to the target repo (`git`) or kept out of git through `.git/info/exclude` (`local`). The approval log is committed either way. **Absent = `local`**: nothing is published without the operator's yes. Enum-checked when present (`BRIEF_INVALID_ARTIFACT_STORE`). |
 
 **Body invariants:** required sections (validator runs in strict mode at write-time, soft mode at read-time):
 - `## TL;DR` — **required at `brief_version ≥ 2.2`** (v5.5); ≤ 5 content lines (soft cap → `BRIEF_TLDR_TOO_LONG` warning). Layer 3 of the framing-alignment defense.
@@ -108,8 +110,12 @@ Optional but standard sections: `## Non-Goals`, `## Constraints`, `## Preference
 
 **Intent approval gate (veikart steg 1) — additive schema, consumer-side requirement.** The two `intent_approved_*` fields are additive and optional in the schema: `brief-validator.mjs` does not require them, `/trekresearch` does not read them, and no `brief_version` bump is involved. The requirement lives in `/trekplan` Phase 1 (`### Read the brief`), which runs `intent-approval.mjs --check` and **halts** on `BRIEF_INTENT_NOT_APPROVED` (no marker), `BRIEF_INTENT_APPROVAL_STALE` (`## Intent` or `## Goal` changed after approval) or `BRIEF_INTENT_APPROVAL_INVALID` (malformed marker, or a section missing, empty or present more than once; a `## ` line inside a code block or HTML comment is not a heading). It is version-independent, so a brief from ANY producer, of any `brief_version`, stops at `/trekplan` until approved. No producer has to emit anything new: the operator approves through `/trekbrief --approve <project-dir | brief-file>`, a Voyage-side step open to every producer's brief, whether it is planned with `--project` (`<dir>/brief.md`) or `--brief <file>`, so no producer is privileged. `trekreview` briefs are exempt. The exemption is read from the brief's own frontmatter, so relabelling a brief `type: trekreview` walks past the gate, the same trust class as self-stamping. **What the marker does not prove:** same user, same machine. Any session can run `--stamp`. The marker is a trace that the approval step ran against this exact text, not a signature (see the header of `lib/validators/intent-approval.mjs`). `--stamp` also emits `brief-approved` to `trekexecute-stats.jsonl` under `CLAUDE_PLUGIN_DATA`, falling back to the plugin data dir the yardstick reads, on both the manual and the auto path.
 
+**Approval log (K2) — consumer-side requirement, no schema change.** After the stamp, `/trekbrief` appends the approval to the target repo's log with `lib/util/approval-log.mjs append --kind intent --subject <brief> --sha256 <intent hash>` and commits it with `lib/util/artifact-commit.mjs` (the log always; the brief too when `artifact_store: git`). The log (`.claude/voyage/approvals.jsonl`, read and written only by that CLI) is append-only and hash-chained: each record carries `seq`, `ts`, `kind` (`intent | plan | review | merge | release`), `subject`, the content's `sha256`, an optional `expires`, `prev` and its own `hash`. `/trekplan` Phase 1 runs `approval-log.mjs verify --kind intent --subject <brief> --sha256 <intent_approved_hash>` after the marker check and halts on `broken` (a record edited, removed or reordered), `diverged` (the committed log is no longer a prefix of the file), `not-logged` or `mismatch`; exit 2 (could not run) halts too. A brief approved before the log existed is `not-logged`: the remedy is the same `/trekbrief --approve`, open to every producer's brief. Only an explicit "Approve" counts: `approval-log.mjs answer` refuses «høres bra ut», «gjør som du vil» and an empty answer. Trust limits are those of the marker (same user, same machine; a trace, not a signature); what the log adds is that each approval is a commit in `git log`, and that a committed approval cannot be rewritten without `diverged`. Adapted from bashebr/ai-native-sdlc@11fb8d7 (MIT), corrected so the approval is bound to content and cannot be written unseen.
+
 **Failure modes:**
 - `BRIEF_INTENT_NOT_APPROVED` / `BRIEF_INTENT_APPROVAL_STALE` / `BRIEF_INTENT_APPROVAL_INVALID` → `/trekplan` halts (intent-approval gate, above); remedy `/trekbrief --approve <project-dir | brief-file>`
+- approval log `broken` / `diverged` → `/trekplan` halts; restore `.claude/voyage/approvals.jsonl` from git. `not-logged` / `mismatch` → halts; remedy `/trekbrief --approve <project-dir | brief-file>`
+- `BRIEF_INVALID_CEREMONY` / `BRIEF_INVALID_ARTIFACT_STORE` → strict halt; the optional field is present with a value outside its enum
 - `BRIEF_NOT_FOUND` → consumer halts with a usage message
 - `FM_MISSING` → file has no frontmatter; halt
 - `BRIEF_WRONG_TYPE` → file is not a brief; halt