| name | ai-constitution |
| description | Interviews the operator to produce a project-identity CONSTITUTION.md (Mission / Stakeholders / Vocabulary / Prohibitions / Compliance gates / Anti-goals / Boundaries / Escalation / Language / Lifecycle phase). Trigger for 'set up the constitution', 'define project identity', 'who is this project for', 'what does this project never do', 'amend the constitution'. Not for AI-behaviour rules — those live in CANONICAL.md / AGENTS.md. Not for spec governance; use /ai-governance instead. |
| effort | mid |
| argument-hint | [generate|update|amend] |
| model_tier | sonnet |
| mirror_family | antigravity-skills |
| generated_by | ai-eng sync |
| canonical_source | .claude/skills/ai-constitution/SKILL.md |
| edit_policy | generated-do-not-edit |
Constitution
Quick start
/ai-constitution generate # interview + write CONSTITUTION.md from scratch
/ai-constitution update # change a single section (Mission, Prohibitions, etc.)
/ai-constitution amend # formal amendment with version bump + audit event
Workflow
Principles: §10.6 (SDD) — every write traces to a spec decision (D-131-04 anchored this rewrite). §10.4 (DRY) — project identity lives ONCE in CONSTITUTION.md; AI-behaviour content lives in CANONICAL.md; the two never overlap.
- Auto-detect — read
.ai-engineering/manifest.yml + package files (pyproject.toml / package.json / Cargo.toml) to seed name, stack, version.
- Read existing — if
CONSTITUTION.md exists, load it and show the operator the diff BEFORE any overwrite. NEVER overwrite without diff + explicit confirm (R-131-03 mitigation).
- Interview the 10 sections — see "Interview" below.
- Write — emit
CONSTITUTION.md on the 10-section skeleton. Refuse to write any AI-behaviour / engineering-principle header (those belong to CANONICAL.md): Think Before Coding, Simplicity First, Surgical Changes, Goal-Driven Execution, Plan-Mode Default, Subagent Strategy, Self-Improvement Loop, Demand Elegance, Autonomous Bug Fixing, KISS, YAGNI, SOLID, DRY, TDD, SDD, Clean Code, Hexagonal Architecture. (Framework dev repo canonical list: tools/skill_lint/checks/md_mirror.py:FORBIDDEN_CONSTITUTION_HEADERS.)
- Rotate — on
update/amend that replaces operator-authored content, copy the pre-write body to .ai-engineering/specs/_history-constitution-<YYYY-MM-DD>.md so prior identity is recoverable.
- Verify + record (fail-open — never block the write on verify/audit failure):
- Re-read
CONSTITUTION.md; confirm it carries only the 10 identity sections and none of the Step 4 AI-behaviour headers.
- Do NOT shell out to
skill_lint: it is a framework-dev mirror-parity gate whose module is absent on a consumer's bare python3 and which false-fails on .codex/.github mirror surfaces a consumer legitimately lacks.
- The run is already audited as a
skill_invoked event by the UserPromptSubmit hook — no manual emit required. Optional distinct marker: emit framework_event kind=framework_operation (operation=constitution_update, component: ai-constitution, detail: {version, sections_changed, mode}).
Interview
| Section | Question |
|---|
| Mission | What does this project do, and what does it never do? |
| Stakeholders | Who relies on this project? Who pays the cost when it breaks? |
| Vocabulary | What domain terms must every contributor use precisely? |
| Prohibitions | What must the AI / contributors NEVER do? |
| Compliance gates | What pipelines / audits / certifications gate releases? |
| Anti-goals | What use cases are explicitly out of scope (and why)? |
| Boundaries | Which surfaces are framework-owned vs team-owned? |
| Escalation | Who is paged when prohibitions / gates fail? |
| Language | Project natural language for docs / commits. |
| Lifecycle phase | greenfield · stabilising · mature · sunset. |
Examples
User: "amend the constitution to add 'no LLM-generated production secrets' to prohibitions" → /ai-constitution amend loads the existing body, presents the diff for the Prohibitions section, applies the amendment, bumps the minor version, records the amendment row in the governance footer, and rotates the pre-amendment body into _history-constitution-<date>.md.
Integration
Called by: ai-eng install (governance phase), /ai-start (cold-load identity). Reads: manifest.yml, package files, existing CONSTITUTION.md, decision-store.json. Writes: CONSTITUTION.md, _history-constitution-<date>.md (on rotate). Consumed by: every skill at Step 0. CI-guarded (framework dev repo only) by tools/skill_lint/checks/md_mirror.py:check_constitution_clean — any AI-behaviour header fails that gate; consumers rely on the inline Step 6 self-check. See also: /ai-governance (compliance against the constitution), CANONICAL.md (AI-behaviour layer — never written by this skill).
$ARGUMENTS
