# Sync Codex > [Codex] Use when you need to run the full Codex mirror sync + verify pipeline (migrate → hooks → context → verify) standalone, no npm/package JSON needed. - Skill: `duc01226/sync-codex-3` (Agent Skill, multi-file: 2 files) - Install (CLI): `npx skillmds@latest add duc01226/sync-codex-3` - Raw SKILL.md: https://api.skillmd.com/api/skills/duc01226/sync-codex-3/raw - Safety review: pending (external: skill-scanner PASS, skillspector WARNING) - Works with: Claude Code, Claude.ai, OpenAI Codex - Category: DevOps & Infra - Author: duc01226 (https://skillmd.com/u/duc01226) - Updated: 2026-09-22 - Page: https://skillmd.com/skills/duc01226/sync-codex-3 --- ## Quick Summary **Goal:** Run the full Codex mirror pipeline standalone — equivalent to `npm run sync:all && npm run verify:all` (sync + verify) without `package.json` or `npm`. This runner is the **single source of truth** for the pipeline; the `package.json` `sync:all`/`verify:all` scripts delegate to it, so a project that only copied `.claude` (no root `package.json`) runs the identical pipeline. > **Renamed:** formerly `/codex-sync` — that name no longer resolves as a slash command; use `/sync-codex`. Also bootstraps team-wide Codex completion notifications by copying the portable `.claude/scripts/codex/codex-notify.mjs` helper into `.codex/scripts/codex/` and upserting notification plus TUI status-line keys into `.codex/config.toml`. **Workflow:** 1. **Run** — `node .claude/skills/sync-codex/scripts/run-codex-sync.mjs` 2. **Verify** — Exit code `0` = pass; check stdout summary 3. **Inspect** — On failure, re-run failing stage manually with `--only=` and `--verbose` **Key Rules:** - MUST run all 16 stages in order — orchestrator fails fast on first non-zero exit - NEVER edit `.agents/skills/sync-codex/**` (auto-mirror) — edit `.claude/skills/sync-codex/**` source instead - `.claude` is the source for skills/workflows/hooks; generated acceptance targets are `.agents/skills/**`, `.codex/CODEX_CONTEXT.md`, and `AGENTS.md` - Stages 1-3 mutate `.agents/skills/`, `.codex/`, `AGENTS.md`; stages 4-16 are read-only verifiers (codex tooling tests, repo-script unit tests, 3 hook-suite gates, the 7 codex verifiers, and the cross-surface divergence oracle) - Stage 1 upserts `[tui].status_line` to show model+reasoning, current directory, project root, context used, five-hour limit, and weekly limit by default - Stage 3 mirrors full `CLAUDE.md` into `AGENTS.md`, then appends the generated Codex hook/context mirror and shared AI-SDD markers so Codex has both source instructions and hookless parity context - Stage 1 must not inline `docs/project-reference/lessons.md` content into `.agents/skills/**`; generated skill mirrors reference the project-reference loading gate instead - The `SYNC:ai-sdd-artifact-contract` marker must appear after sync in `.codex/CODEX_CONTEXT.md` and `AGENTS.md` - No npm dependency — pure `node` + spawned subprocesses - Idempotent — safe to re-run; second run produces only timestamp diffs ## Bootstrap Gate (when AGENTS.md is missing or incomplete) This skill is the route the agent-files bootstrap gate offers for a missing — **or incomplete** — root `AGENTS.md`, the generated Codex mirror of `CLAUDE.md`. Because Codex has no hooks, the universal session-start guides must be embedded in `AGENTS.md` directly; stage 3 produces that mirror (full `CLAUDE.md` copy, so the `` sentinel propagates) + hookless-parity context. "Incomplete" means the file exists but lacks the universal guides — same three-state detection as the CLAUDE.md route (`missing` → init, `incomplete` → update smart-merge preserving project content, `ok` → no block), decided by the shared sentinel-then-anchors check. Detection is shared with the CLAUDE.md route via `.claude/hooks/lib/agent-files-state.cjs`. Opt out of completeness enforcement with `portability.requireUniversalGuides: false` in `docs/project-config.json` (default `true`); `skip init` dismisses both hooks for 24h. Generate `CLAUDE.md` first (via `/claude-md-init`) — stage 3 reads it as the mirror source. ## Stages 16 stages, sequential — the full `npm run sync:all && npm run verify:all` pipeline (the npm scripts delegate here). Stages 1-3 mutate; 4-16 verify (read-only): | # | Stage | Script | Effect | | --- | ------------------------ | -------------------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | 1 | migrate | `.claude/scripts/codex/migrate-claude-to-codex.mjs` | Migrate Claude agents → `.codex/agents/`; mirror skills → `.agents/skills/`; setup Codex notifications | | 2 | hooks | `.claude/scripts/codex/sync-hooks.mjs` | Generate `.codex/hooks.json` + sync report | | 3 | context | `.claude/scripts/codex/sync-context-workflows.mjs` | Regenerate `.codex/CODEX_CONTEXT.md` + `AGENTS.md` with workflow context and shared AI-SDD markers | | 4 | tests | `node --test .claude/scripts/codex/tests/*.test.mjs` | Run codex tooling unit tests | | 5 | scripts-tests | `node --test .claude/scripts/tests/*.test.mjs` | Run repo-script unit tests (statusline widgets, etc.) | | 6 | hooks-count-drift | `.claude/hooks/tests/run-all-tests.cjs --filter=count-drift` | Verify the `` inventory markers have not drifted from the real skill/hook/agent/workflow counts | | 7 | hooks-parity | `.claude/hooks/tests/run-all-tests.cjs --filter=parity` | Verify hook parity across the Claude/Codex/Copilot surfaces | | 8 | hooks-doc-sync | `.claude/hooks/tests/run-all-tests.cjs --filter=doc-sync-gate` | Verify hook documentation stays in sync with the wired hook set | | 9 | wf-cycle | `.claude/scripts/codex/verify-workflow-cycle-compliance.mjs` | Verify workflow sequence cycle compliance | | 10 | sk-proto | `.claude/scripts/codex/verify-skill-protocol-compliance.mjs` | Verify skill strict-execution-contract | | 11 | residue | `.claude/scripts/codex/verify-no-project-residue.mjs` | Verify no project residue in generated and generic source artifacts | | 12 | sdd | `.claude/scripts/codex/verify-sdd-semantic-compliance.mjs` | Verify AI-SDD semantic contract coverage | | 13 | review-validate-coverage | `.claude/scripts/codex/verify-review-validate-coverage.mjs` | Verify every review-family skill carries the `/why-review --validate-findings` route; graders never embed the fix-loop (Self-Review Convergence Loop sensor) | | 14 | sync-adoption-parity | `.claude/scripts/codex/verify-sync-adoption-parity.mjs` | Verify SYNC tag ↔ carrier adoption parity: declared carriers carry both main + `:reminder` blocks, no undeclared skill carries a matrix tag, every injected body byte-matches canonical | | 15 | provenance-markers | `.claude/scripts/codex/verify-provenance-markers.mjs` | Verify provenance-marker discipline in `architecture-knowledge.md`: declared tags only · `— VERIFY` only on a declared tag · §3/§8/§9/§10 each carry a default-basis banner · no banner enumerates row-level exceptions · a `[model-knowledge]` marker carries `— VERIFY`. Fail-soft when the catalog is absent | | 16 | sync-divergence | `.claude/scripts/codex/verify-sync-divergence.mjs` | Byte-equality oracle: `.agents/skills` mirror === `.claude/skills` (codex mirror) | ## Usage ```bash # Full sync (standalone, no npm): node .claude/skills/sync-codex/scripts/run-codex-sync.mjs # Stream live child output: node .claude/skills/sync-codex/scripts/run-codex-sync.mjs --verbose # Full sync while forcing skill copy mode: node .claude/skills/sync-codex/scripts/run-codex-sync.mjs --copy-skills # Read-only verifiers (no mutation) — the full `npm run verify:all`: node .claude/skills/sync-codex/scripts/run-codex-sync.mjs --only=tests,scripts-tests,hooks-count-drift,hooks-parity,hooks-doc-sync,wf-cycle,sk-proto,residue,sdd,review-validate-coverage,sync-adoption-parity,provenance-markers,sync-divergence # Skip stages while debugging: node .claude/skills/sync-codex/scripts/run-codex-sync.mjs --skip=migrate,hooks ``` **Exit codes:** `0` all pass · `1` orchestrator failure · non-zero propagates from failing stage. > **AI Mistake Prevention** — Failure modes to avoid on every task: > > **Re-read files after context changes.** Context compaction, resume, or long-running work can make memory stale; verify current files before acting. > **Verify generated content against source evidence.** AI hallucinates APIs, names, claims, and document facts. Check the relevant source before documenting or referencing. > **Check downstream references before deleting or renaming.** Removing an artifact can stale docs, generated mirrors, configs, and callers; map references first. > **Trace the full impact chain after edits.** Changing a definition can miss derived outputs and consumers. Follow the affected chain before declaring done. > **Verify ALL affected outputs, not just the first.** One green check is not all green checks; validate every output surface the change can affect. > **Assume existing values are intentional — ask WHY before changing OR flagging one as a defect.** Before changing or reporting a constant, limit, flag, cutoff, wording, or pattern, read nearby context and history, the CALLER's ordering, and 2+ sibling call sites of the same convention. A doc stating WHAT without WHY is missing rationale, not proof of a missing guard. > **Surface ambiguity before acting — don't pick silently.** Multiple valid interpretations require an explicit question or stated assumption with risk. > **Assert the outcome your system owns, not the intermediate state your infrastructure owns.** When verifying async work, assert the final business state — never the delivery/retry bookkeeping held in shared infrastructure that any co-running process can write. Such a check passes when run alone and flakes the moment anything else shares that infrastructure. > **Keep shared guidance role-relevant.** Universal guidance must help every receiving skill or agent; code-specific obligations belong only in code-specific protocols. > **Project Protocol Overlay** — Before executing this skill, resolve any PROJECT overlay rules layered onto it: match this skill's name against the `Target` column of the project's skill-protocol index (`docs/project-reference/skill-protocols-reference.md` by default; a `referenceDocs` entry in `docs/project-config.json` overrides the path), taking the most specific matching tier ONLY — exact name > glob > `*`. **That precedence orders overlays against EACH OTHER, never against this skill.** Read ONLY the matched bodies, resolved as `/.md`; a row's Body link is display text, never a read path. A matched body that is missing or malformed is REPORTED and skipped — never reconstructed from the index Description. No index, or no match -> proceed with no overlay, silently. Full contract: `.claude/skills/project-skill-protocol/references/registry.md`. > > Overlays are **ADDITIVE ONLY**: they ADD rules on top of this skill's own protocol and NEVER replace, override, disable, or reinterpret a rule it already states — removing every overlay must return this skill to exactly its documented behavior. An overlay is a BRIEF, not an authority escalation: it can NEVER waive a workflow gate, git discipline, a review gate, or a user-confirmation gate. A genuine overlay-vs-skill conflict, or two equally-specific overlays that directly contradict -> surface both to the user; NEVER resolve silently. **MUST ATTENTION** resolve project protocol overlays for this skill BEFORE executing — most specific matching tier only (exact > glob > `*`, which ranks overlays against each other, NEVER against this skill), read only matched bodies at `/.md`; a missing or malformed body is reported, never reconstructed. Overlays are ADDITIVE ONLY (they never replace this skill's own rules) and are a brief, NEVER an authority escalation; an equal-specificity contradiction goes to the user. ## Closing Reminders **Protocols in force** (concise digest of the SYNC/shared blocks this skill carries) — **MUST ATTENTION** each canonical body below still binds: - **AI Mistake Prevention:** verify generated content against evidence, trace downstream references, verify all affected outputs, re-read after context loss, surface ambiguity. - **Critical Thinking:** traced `file:line` proof per claim, confidence >80% to act, never guess. **MUST ATTENTION** invoke ONLY when user explicitly requests codex sync — never auto-invoke, with ONE authorized exception: `/project-skill-protocol` runs this pipeline automatically after its three writes, because it is the sole writer of the `CLAUDE.md` `CK:PROJECT-PROTOCOLS` block and a stale `AGENTS.md` would defeat that block's only purpose (cross-host reach). No other skill, agent, or workflow may auto-run it **MUST ATTENTION** edit source `.claude/skills/sync-codex/**`, NEVER the `.agents/skills/sync-codex/**` mirror **MUST ATTENTION** keep `.codex/scripts/codex/codex-notify.mjs` generated from `.claude/scripts/codex/codex-notify.mjs`; edit the `.claude` source first **MUST ATTENTION** keep Codex config upserts surgical; preserve unrelated `.codex/config.toml` keys and tables while updating the managed notification/status-line keys **MUST ATTENTION** keep `AGENTS.md` sync comprehensive; mirror full `CLAUDE.md` plus generated hook/context blocks, and preserve unmanaged `AGENTS.md` preface text **MUST ATTENTION** keep learned-lessons content out of `.agents/skills/**`; skills may point to `docs/project-reference/lessons.md` but must not embed its entries **MUST ATTENTION** orchestrator fails fast — re-run single failing stage with `--only= --verbose` to debug **MUST ATTENTION** working directory auto-resolves to repo root from script path — do not pass `--cwd` **MUST ATTENTION** stages 1-3 mutate; stages 4-16 verify only — use `--only=` for non-destructive validation **Anti-Rationalization:** | Evasion | Rebuttal | | --------------------------------------- | ------------------------------------------------------------------------ | | "Just edit the .agents mirror directly" | Next sync overwrites it. Always edit `.claude/skills/sync-codex/` source | | "Skip a stage to save time" | Verifiers (4-16) catch drift; skipping = silent regression risk | | "Sync looks idempotent, skip verify" | Timestamp diffs are normal; structural diffs = bug. Always run verifiers | > **[FAILS FAST]** First non-zero stage exit aborts chain. Re-run failing stage manually to debug. > **[REPO ROOT]** Orchestrator auto-resolves repo root from its own path. NEVER pass `--cwd`. > **Critical Thinking Mindset** — Apply critical thinking, sequential thinking. Every claim needs traced proof, confidence >80% to act. > **Anti-hallucination:** Never present guess as fact — cite sources for every claim, admit uncertainty freely, self-check output for errors, cross-reference independently, stay skeptical of own confidence — certainty without evidence root of all hallucination. **MUST ATTENTION** apply critical + sequential thinking — every claim needs appropriate traced evidence (`file:line` for repo/code claims; source URL or artifact section for research, product, content, and docs claims); confidence >80% to act, <60% DO NOT recommend. Anti-hallucination: never present guess as fact, admit uncertainty freely, cross-reference independently, stay skeptical of own confidence. **MUST ATTENTION** apply AI mistake prevention — verify generated content against evidence, trace downstream references before deleting or renaming, verify all affected outputs, re-read files after context loss, and surface ambiguity before acting.