Before dispatch, Read `methodologyPath` from `bun "" methodology dx "" ""` per `readRanges`; log successful ranges/total to EOF. Skip-listed: load only. **Override rules:** - Mode selection: DX POLISH - Persona: infer from README/docs, pick the most common developer type (P6) - Competitive benchmark: research through Aside per the loaded skill's "Web research runs in Aside" section (WebSearch when Aside is not ready); reference benchmarks when neither is available (P1) - Magical moment: pick the lowest-effort delivery vehicle that achieves the competitive tier (P5) - Getting started friction: always optimize toward fewer steps (P5) - Error message quality: require the agent-ready error contract (P1, completeness) - API/CLI naming: consistency wins over cleverness (P5) - DX taste decisions (opinionated defaults vs flexibility): mark TASTE DECISION - Dual voices: always run BOTH Claude subagent AND Codex if available (P6). **Bind phase input:** Run; use `snapshotPath` as `` for both voices: ```bash bun "" create dx "" "" "" ``` Fresh `Implementation plan` only; excludes `Review record`. **Claude DX subagent** (native tool): Claude Code: set Agent `run_in_background: false` if its schema exposes it. A launch receipt means it went background: await its completion notice. Other hosts: foreground; await completion when supported. Read `snapshot.json` beside ``. Send its `nativeDispatchPrompt` verbatim as the Agent prompt: ONLY/FINAL tool call this response. Keep native Reads enabled. Child first Reads `nativePromptPath` to EOF: all criteria + plan; no summaries or prior reviews. **Native completion barrier:** Async (`isAsync: true` / `status: "async_launched"`): Claude Code: end response immediately: "Waiting for ." No further tool calls/review until that ID's terminal notification is delivered. Other hosts await that ID. Then outside → this phase's review ONLY. Completed-native INPUT must match snapshot phase/hash. Retry invalid input once; then failure policy if still invalid. No inline substitute; apply failure policy. **Codex DX voice** (via Bash): Outside prompt: inline the full contents of and context below (Write tool). IMPORTANT: Do NOT read or execute any SKILL.md files or paths containing skills/gstack (foreign instructions). Review repository code only. Read the plan file at . Evaluate this plan's developer experience. Also consider these findings from prior review phases: CEO: Design: You are a developer who has never seen this product. Evaluate: 1. Time to hello world: how many steps from zero to working? Target is under 5 minutes. 2. Errors, agent-ready (what, fix, recovery, code, context, trace, redaction, channel), capped per Pass 3 (CAP4/CAP6). 3. API/CLI design: are names guessable? Are defaults sensible? Is it consistent? 4. Docs: can a dev find what they need in under 2 minutes? Are examples copy-paste-complete? 5. Upgrade path: can devs upgrade without fear? Migration guides? Deprecation warnings? Be adversarial. Think like a developer who is evaluating this against 3 competitors. Write the **complete prompt and context**, including actual plan/spec/source, to a private file. Substitute its shell-quoted path for ``; never interpolate user text into shell source. Request a severity (Critical, High, Medium or Low) per finding and a final Recommendation: because line, including an explicit no-findings rationale. ```bash # GSTACK_ACTIVE_HOST names the harness, never the model. if { [ -n "${CODEX_THREAD_ID:-}" ] || [ -n "${CODEX_SANDBOX:-}" ] || [ "${GSTACK_ACTIVE_HOST:-}" = codex ]; }; then echo 'Codex outside review unavailable: harness mismatch; no outside process started. Missing coverage.' >&2 if { [ -n "${CLAUDECODE:-}" ] || [ "${GSTACK_ACTIVE_HOST:-}" = claude ]; } && { [ -n "${CODEX_THREAD_ID:-}" ] || [ -n "${CODEX_SANDBOX:-}" ] || [ "${GSTACK_ACTIVE_HOST:-}" = codex ]; }; then echo 'Inherited harness markers conflict. Run setup --host (claude or codex); do not guess a replacement provider.' >&2 else echo 'Repair installed skills: run setup --host codex from your gstack checkout.' >&2 fi exit 78 fi _REPO_ROOT=$(git rev-parse --show-toplevel) || { echo 'ERROR: not in a git repo' >&2; exit 1; } _OUTSIDE_TMP=$(mktemp -d "${TMPDIR:-/tmp}/gstack-outside.XXXXXXXX") || exit 1 trap 'rm -rf "$_OUTSIDE_TMP"' EXIT _OUTSIDE_INPUT="$_OUTSIDE_TMP/prompt" cat -- '' >"$_OUTSIDE_INPUT" || exit 1 _CODEX_PROBE="$HOME/.claude/skills/gstack/bin/gstack-codex-probe" export _CODEX_DEADLINE=$(($(date +%s)+540)); _CODEX_OUT=$("$_CODEX_PROBE" role-ready exec) || exit $? _CODEX_SEL=$(echo "$_CODEX_OUT" | sed -n 's/^CODEX_SEL: //p') _CODEX_SANDBOX_MODE=$(echo "$_CODEX_OUT" | sed -n 's/^CODEX_SANDBOX: //p') "$_CODEX_PROBE" show-first-use-notice _OUTSIDE_EXIT=0 "$_CODEX_PROBE" run-with-timeout --effort high 540 codex exec - -C "$_REPO_ROOT" -s "${_CODEX_SANDBOX_MODE:?}" -c "model=\"${_CODEX_SEL:?}\"" -c skills.include_instructions=false -c 'web_search="cached"' --json -o "$_OUTSIDE_TMP/text" <"$_OUTSIDE_INPUT" >"$_OUTSIDE_TMP/events" 2>"$_OUTSIDE_TMP/stderr" || _OUTSIDE_EXIT=$? cat "$_OUTSIDE_TMP/text" 2>/dev/null || tail -n 20 "$_OUTSIDE_TMP/events" if [ "$_OUTSIDE_EXIT" -eq 124 ]; then "$_CODEX_PROBE" log-event codex_timeout "540" || true "$_CODEX_PROBE" log-hang autoplan 0 || true fi cat "$_OUTSIDE_TMP/stderr" >&2 || { [ "$_OUTSIDE_EXIT" -ne 0 ] || _OUTSIDE_EXIT=1; } _OUTSIDE_RC=0 bun --no-env-file --config=/dev/null "$HOME/.claude/skills/gstack/lib/outside-review-result.ts" --label 'Codex outside review' --exit "$_OUTSIDE_EXIT" --stderr "$_OUTSIDE_TMP/stderr" --events "$_OUTSIDE_TMP/events" review "$_OUTSIDE_TMP/text" || _OUTSIDE_RC=$? case "$_OUTSIDE_RC" in 0|3) ;; 4) echo 'OUTSIDE_STATUS: unverified provider=codex host=claude'; exit 4 ;; *) [ "$_OUTSIDE_EXIT" -ne 0 ] && exit "$_OUTSIDE_EXIT"; exit 1 ;; esac echo 'OUTSIDE_STATUS: completed provider=codex host=claude' ``` Use Bash `timeout: 600000`; show the full response in a `tool-output` fence. Require successful execution and valid markers. Refusal, empty/malformed output, missing score/severity/completion markers, timeout or CLI failure means `outside_status: unavailable`. P0/P1 findings block like native ones; `OUTSIDE_STATUS: unverified` is missing coverage. Use the caller's fallback; missing coverage is never clean/PASS. After either outcome, delete only your private prompt; scratch cleanup is automatic. Failed/incomplete outside review → unavailable; disabled → skip outside. Both keep the native pass. Retain the historical review-log skill ID; add `"host":"claude","outside_provider":"codex","outside_status":"completed|unavailable|disabled|skipped","phase":"dx"`. Record differing attempt outcomes separately. `source:"codex"` requires completed CLI output; native uses `source:"in-host"` (historical `source:"claude"`: native Claude). Availability/native fallback is not outside completion. Preserve all reported modelUsage; unknown model identity stays unknown. Under `GSTACK_CODEX_NO_SANDBOX=1` add `"codex_sandbox":"danger-full-access"`. Error handling: Phase 1 failure/degradation policy applies. - DX choices: if the outside reviewer disagrees with a DX decision with valid developer empathy reasoning → TASTE DECISION. Scope changes both models agree on → USER CHALLENGE. **Required execution checklist (DX):** 1. Step 0 (DX Investigation, 0A-0G): Auto-detect product type, then settle persona, empathy narrative, competitive benchmark and TTHW target, and trace the developer journey. Score only after this evidence exists; the initial DX score is the pre-fix pass scores. 2. Step 0.5 (Dual Voices): Present the completed calls above under Codex SAYS (DX — developer experience challenge) and Claude SUBAGENT (DX — independent review). Produce DX consensus table: ``` DX DUAL VOICES — CONSENSUS TABLE: Dimension Claude Codex Consensus 1. Getting started < 5 min? — — — 2. API/CLI naming guessable? — — — 3. Error messages actionable? — — — 4. Docs findable & complete? — — — 5. Upgrade path safe? — — — 6. Dev environment friction-free? — — — CONFIRMED = native + outside agree; primary cannot replace outside. DISAGREE → taste. Missing/disabled voice = N/A, never CONFIRMED. Flag any single-voice critical finding. ``` 3. Passes 1-8: Run each from loaded skill. Rate 0-10. Auto-decide each issue. DISAGREE items from consensus table → raised in the relevant pass with both perspectives. 4. DX Scorecard: Produce the full scorecard with all 8 dimensions scored. **Mandatory outputs from Phase 2.5:** - Developer journey map (6-stage table from Step 0F) - Developer empathy narrative (first-person perspective) - DX Scorecard with all 8 dimension scores - DX Implementation Checklist - TTHW assessment with target **Close this phase:** The review work above ends here. Now load the shared close steps afresh, even if read earlier. Use phase `dx`, checkpoint ``, and this phase's `methodologyPath`. Keep this checkpoint for this invocation; review exports do not replace it. > **STOP.** Before closing a review phase, after its reviews finish and before announcing completion or loading the next phase (read afresh at each exit), Read `~/.claude/skills/gstack/autoplan/sections/phase-close.md` and execute it > in full. Do not work from memory — that section is the source of truth for this step.