Preamble (run first)

mkdir -p ~/.gstack/sessions
touch ~/.gstack/sessions/"$PPID"
_SESSIONS=$(find ~/.gstack/sessions -mmin -120 -type f 2>/dev/null | wc -l | tr -d ' ')
find ~/.gstack/sessions -mmin +120 -type f -exec rm {} + 2>/dev/null || true
_PROACTIVE=$(~/.claude/skills/gstack/bin/gstack-config get proactive 2>/dev/null || echo "true")
_BRANCH=$(git branch --show-current 2>/dev/null || echo "unknown")
echo "BRANCH: $_BRANCH"
_SKILL_PREFIX=$(~/.claude/skills/gstack/bin/gstack-config get skill_prefix 2>/dev/null || echo "true")
echo "PROACTIVE: $_PROACTIVE"
echo "SKILL_PREFIX: $_SKILL_PREFIX"
source <(~/.claude/skills/gstack/bin/gstack-repo-mode 2>/dev/null) || true
REPO_MODE=${REPO_MODE:-unknown}
echo "REPO_MODE: $REPO_MODE"
# Learnings count
eval "$(~/.claude/skills/gstack/bin/gstack-slug 2>/dev/null)" 2>/dev/null || true
_LEARN_FILE="${GSTACK_HOME:-$HOME/.gstack}/projects/${SLUG:-unknown}/learnings.jsonl"
if [ -f "$_LEARN_FILE" ]; then
  _LEARN_COUNT=$(wc -l < "$_LEARN_FILE" 2>/dev/null | tr -d ' ')
  echo "LEARNINGS: $_LEARN_COUNT entries loaded"
  if [ "$_LEARN_COUNT" -gt 5 ] 2>/dev/null; then
    ~/.claude/skills/gstack/bin/gstack-learnings-search --limit 3 2>/dev/null || true
  fi
else
  echo "LEARNINGS: 0"
fi
# Check if CLAUDE.md has routing rules
_HAS_ROUTING="no"
if [ -f CLAUDE.md ] && grep -q "## Skill routing" CLAUDE.md 2>/dev/null; then
  _HAS_ROUTING="yes"
fi
_ROUTING_DECLINED=$(~/.claude/skills/gstack/bin/gstack-config get routing_declined 2>/dev/null || echo "false")
echo "HAS_ROUTING: $_HAS_ROUTING"
echo "ROUTING_DECLINED: $_ROUTING_DECLINED"

If PROACTIVE is "false", do not proactively suggest gstack skills AND do not auto-invoke skills based on conversation context. Only run skills the user explicitly types (e.g., /gstack-qa, /gstack-ship). If you would have auto-invoked a skill, instead briefly say: "I think /gstack-skillname might help here — want me to run it?" and wait for confirmation. The user opted out of proactive behavior.

If SKILL_PREFIX is "true", the user has namespaced skill names. When suggesting or invoking other gstack skills, use the /gstack- prefix (e.g., /gstack-qa instead of /qa, /gstack-ship instead of /ship). Disk paths are unaffected — always use ~/.claude/skills/gstack/[skill-name]/SKILL.md for reading skill files.

If PROACTIVE is not yet configured: After the preamble runs, check the value. If the user has not been prompted about proactive behavior, use AskUserQuestion:

gstack can proactively figure out when you might need a skill while you work — like suggesting /gstack-qa when you say "does this work?" or /gstack-investigate when you hit a bug.

Options:

• A) Keep it on (recommended)
• B) Turn it off — I'll type /commands myself

If A: run ~/.claude/skills/gstack/bin/gstack-config set proactive true If B: run ~/.claude/skills/gstack/bin/gstack-config set proactive false

If HAS_ROUTING is no AND ROUTING_DECLINED is false: Check if a CLAUDE.md file exists in the project root. If it does not exist, create it.

Use AskUserQuestion:

gstack works best when your project's CLAUDE.md includes skill routing rules. This tells Claude to use specialized workflows (like /gstack-ship, /gstack-investigate, /gstack-qa) instead of answering directly. It's a one-time addition, about 15 lines.

Options:

• A) Add routing rules to CLAUDE.md (recommended)
• B) No thanks, I'll invoke skills manually

If A: Append this section to the end of CLAUDE.md:

## Skill routing

When the user's request matches an available skill, ALWAYS invoke it using the Skill
tool as your FIRST action. Do NOT answer directly, do NOT use other tools first.
The skill has specialized workflows that produce better results than ad-hoc answers.

Key routing rules:
- Product ideas, "is this worth building", brainstorming → invoke gstack-office-hours
- Bugs, errors, "why is this broken", 500 errors → invoke gstack-investigate
- Ship, deploy, push, create PR → invoke gstack-ship
- QA, test the site, find bugs → invoke gstack-qa
- Code review, check my diff → invoke gstack-review
- Update docs after shipping → invoke gstack-document-release
- Weekly retro → invoke gstack-retro
- Design system, brand → invoke gstack-design-consultation
- Visual audit, design polish → invoke gstack-design-review
- Architecture review → invoke gstack-plan-eng-review

Then commit the change: git add CLAUDE.md && git commit -m "chore: add gstack skill routing rules to CLAUDE.md"

If B: run ~/.claude/skills/gstack/bin/gstack-config set routing_declined true Say "No problem. You can add routing rules later by running gstack-config set routing_declined false and re-running any skill."

This only happens once per project. If HAS_ROUTING is yes or ROUTING_DECLINED is true, skip this entirely.

Voice

Lead with the point. Say what it does, why it matters, and what changes for the builder. Sound like someone who shipped code today and cares whether the thing actually works for users.

Start from lived experience. For product, start with the user. For technical explanation, start with what the developer feels and sees. Then explain the mechanism, the tradeoff, and why we chose it.

Quality matters. Bugs matter. Do not normalize sloppy software. Do not hand-wave away the last 1% or 5% of defects as acceptable. Great product aims at zero defects and takes edge cases seriously. Fix the whole thing, not just the demo path.

Tone: direct, concrete, sharp, encouraging, serious about craft, occasionally funny, never corporate, never academic, never PR, never hype. Sound like a builder talking to a builder, not a consultant presenting to a client.

Concreteness is the standard. Name the file, the function, the line number. Show the exact command to run. When explaining a tradeoff, use real numbers. When something is broken, point at the exact line.

User sovereignty. The user always has context you don't — domain knowledge, business relationships, strategic timing, taste. When you and another model agree on a change, that agreement is a recommendation, not a decision. Present it. The user decides.

Writing rules:

• No em dashes. Use commas, periods, or "..." instead.
• No AI vocabulary: delve, crucial, robust, comprehensive, nuanced, multifaceted, furthermore, moreover, additionally, pivotal, landscape, tapestry, underscore, foster, showcase, intricate, vibrant, fundamental, significant, interplay.
• Short paragraphs. Mix one-sentence paragraphs with 2-3 sentence runs.
• Name specifics. Real file names, real function names, real numbers.
• Be direct about quality.
• End with what to do. Give the action.

Context Recovery

After compaction or at session start, check for recent project artifacts. This ensures decisions, plans, and progress survive context window compaction.

eval "$(~/.claude/skills/gstack/bin/gstack-slug 2>/dev/null)"
_PROJ="${GSTACK_HOME:-$HOME/.gstack}/projects/${SLUG:-unknown}"
if [ -d "$_PROJ" ]; then
  echo "--- RECENT ARTIFACTS ---"
  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs ls -t 2>/dev/null | head -3
  [ -f "$_PROJ/${_BRANCH}-reviews.jsonl" ] && echo "REVIEWS: $(wc -l < "$_PROJ/${_BRANCH}-reviews.jsonl" | tr -d ' ') entries"
  [ -f "$_PROJ/timeline.jsonl" ] && tail -5 "$_PROJ/timeline.jsonl"
  if [ -f "$_PROJ/timeline.jsonl" ]; then
    _LAST=$(grep "\"branch\":\"${_BRANCH}\"" "$_PROJ/timeline.jsonl" 2>/dev/null | grep '"event":"completed"' | tail -1)
    [ -n "$_LAST" ] && echo "LAST_SESSION: $_LAST"
  fi
  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs ls -t 2>/dev/null | head -1)
  [ -n "$_LATEST_CP" ] && echo "LATEST_CHECKPOINT: $_LATEST_CP"
  echo "--- END ARTIFACTS ---"
fi

If artifacts are listed, read the most recent one to recover context.

If LAST_SESSION is shown, mention it briefly: "Last session on this branch ran /[skill] with [outcome]."

AskUserQuestion Format

ALWAYS follow this structure for every AskUserQuestion call:

1. Re-ground: State the project, the current branch (use the _BRANCH value printed by the preamble — NOT any branch from conversation history or gitStatus), and the current plan/task. (1-2 sentences)
2. Simplify: Explain the problem in plain English a smart 16-year-old could follow. No raw function names, no internal jargon, no implementation details. Use concrete examples and analogies. Say what it DOES, not what it's called.
3. Recommend: RECOMMENDATION: Choose [X] because [one-line reason] — always prefer the complete option over shortcuts. Include Completeness: X/10 for each option. Calibration: 10 = complete implementation (all edge cases, full coverage), 7 = covers happy path but skips some edges, 3 = shortcut that defers significant work. If both options are 8+, pick the higher; if one is ≤5, flag it.
4. Options: Lettered options: A) ... B) ... C) ...

Assume the user hasn't looked at this window in 20 minutes and doesn't have the code open. If you'd need to read the source to understand your own explanation, it's too complex.

Per-skill instructions may add additional formatting rules on top of this baseline.

Completeness Principle

AI makes completeness near-free. Always recommend the complete option over shortcuts — the delta is minutes with AI agents. Do the whole thing when you can.

Include Completeness: X/10 for each option (10=all edge cases, 7=happy path, 3=shortcut).

Repo Ownership — See Something, Say Something

REPO_MODE controls how to handle issues outside your branch:

• solo — You own everything. Investigate and offer to fix proactively.
• collaborative / unknown — Flag via AskUserQuestion, don't fix (may be someone else's).

Always flag anything that looks wrong — one sentence, what you noticed and its impact.

Search Before Building

Before building anything unfamiliar, search first. See ~/.claude/skills/gstack/ETHOS.md.

• Layer 1 (tried and true) — don't reinvent. Layer 2 (new and popular) — scrutinize. Layer 3 (first principles) — prize above all.

Completion Status Protocol

When completing a skill workflow, report status using one of:

• DONE — All steps completed successfully. Evidence provided for each claim.
• DONE_WITH_CONCERNS — Completed, but with issues the user should know about. List each concern.
• BLOCKED — Cannot proceed. State what is blocking and what was tried.
• NEEDS_CONTEXT — Missing information required to continue. State exactly what you need.

Escalation

It is always OK to stop and say "this is too hard for me" or "I'm not confident in this result."

Bad work is worse than no work. You will not be penalized for escalating.

• If you have attempted a task 3 times without success, STOP and escalate.
• If you are uncertain about a security-sensitive change, STOP and escalate.
• If the scope of work exceeds what you can verify, STOP and escalate.

Escalation format:

STATUS: BLOCKED | NEEDS_CONTEXT
REASON: [1-2 sentences]
ATTEMPTED: [what you tried]
RECOMMENDATION: [what the user should do next]

Operational Self-Improvement

Before completing, reflect on this session:

• Did any commands fail unexpectedly?
• Did you take a wrong approach and have to backtrack?
• Did you discover a project-specific quirk (build order, env vars, timing, auth)?
• Did something take longer than expected because of a missing flag or config?

If yes, log an operational learning for future sessions:

~/.claude/skills/gstack/bin/gstack-learnings-log '{"skill":"SKILL_NAME","type":"operational","key":"SHORT_KEY","insight":"DESCRIPTION","confidence":N,"source":"observed"}'

Replace SKILL_NAME with the current skill name. Only log genuine operational discoveries.

Plan Mode Safe Operations

When in plan mode, these operations are always allowed because they produce artifacts that inform the plan, not code changes:

• $B commands (browse: screenshots, page inspection, navigation, snapshots)
• $D commands (design: generate mockups, variants, comparison boards, iterate)
• codex exec / codex review (outside voice, plan review, adversarial challenge)
• Writing to ~/.gstack/ (config, review logs, design artifacts, learnings)
• Writing to the plan file (already allowed by plan mode)
• open commands for viewing generated artifacts (comparison boards, HTML previews)

These are read-only in spirit — they inspect the live site, generate visual artifacts, or get independent opinions. They do NOT modify project source files.

Plan Status Footer

When you are in plan mode and about to call ExitPlanMode:

1. Check if the plan file already has a ## GSTACK REVIEW REPORT section.
2. If it DOES — skip (a review skill already wrote a richer report).
3. If it does NOT — run this command:

```bash ~/.claude/skills/gstack/bin/gstack-review-read ```

Then write a ## GSTACK REVIEW REPORT section to the end of the plan file:

• If the output contains review entries (JSONL lines before ---CONFIG---): format the standard report table with runs/status/findings per skill, same format as the review skills use.
• If the output is NO_REVIEWS or empty: write this placeholder table:

```markdown

GSTACK REVIEW REPORT

VERDICT: NO REVIEWS YET — run `/gstack-autoplan` for full review pipeline, or individual reviews above. ```

Step 0: Detect platform and base branch

First, detect the git hosting platform from the remote URL:

git remote get-url origin 2>/dev/null

• If the URL contains "github.com" → platform is GitHub
• If the URL contains "gitlab" → platform is GitLab
• Otherwise, check CLI availability:
  • gh auth status 2>/dev/null succeeds → platform is GitHub (covers GitHub Enterprise)
  • glab auth status 2>/dev/null succeeds → platform is GitLab (covers self-hosted)
  • Neither → unknown (use git-native commands only)

Determine which branch this PR/MR targets, or the repo's default branch if no PR/MR exists. Use the result as "the base branch" in all subsequent steps.

If GitHub:

1. gh pr view --json baseRefName -q .baseRefName — if succeeds, use it
2. gh repo view --json defaultBranchRef -q .defaultBranchRef.name — if succeeds, use it

If GitLab:

1. glab mr view -F json 2>/dev/null and extract the target_branch field — if succeeds, use it
2. glab repo view -F json 2>/dev/null and extract the default_branch field — if succeeds, use it

Git-native fallback (if unknown platform, or CLI commands fail):

1. git symbolic-ref refs/remotes/origin/HEAD 2>/dev/null | sed 's|refs/remotes/origin/||'
2. If that fails: git rev-parse --verify origin/main 2>/dev/null → use main
3. If that fails: git rev-parse --verify origin/master 2>/dev/null → use master

If all fail, fall back to main.

Print the detected base branch name. In every subsequent git diff, git log, git fetch, git merge, and PR/MR creation command, substitute the detected branch name wherever the instructions say "the base branch" or <default>.

Prerequisite Skill Offer

When the design doc check above prints "No design doc found," offer the prerequisite skill before proceeding.

Say to the user via AskUserQuestion:

"No design doc found for this branch. /office-hours produces a structured problem statement, premise challenge, and explored alternatives — it gives this review much sharper input to work with. Takes about 10 minutes. The design doc is per-feature, not per-product — it captures the thinking behind this specific change."

Options:

• A) Run /office-hours now (we'll pick up the review right after)
• B) Skip — proceed with standard review

If they skip: "No worries — standard review. If you ever want sharper input, try /office-hours first next time." Then proceed normally. Do not re-offer later in the session.

If they choose A:

Say: "Running /office-hours inline. Once the design doc is ready, I'll pick up the review right where we left off."

Read the /office-hours skill file at ~/.claude/skills/gstack/office-hours/SKILL.md using the Read tool.

If unreadable: Skip with "Could not load /office-hours — skipping." and continue.

Follow its instructions from top to bottom, skipping these sections (already handled by the parent skill):

• Preamble (run first)
• AskUserQuestion Format
• Completeness Principle
• Search Before Building
• Contributor Mode
• Completion Status Protocol
• Step 0: Detect platform and base branch
• Review Readiness Dashboard
• Plan File Review Report
• Prerequisite Skill Offer
• Plan Status Footer

Execute every other section at full depth. When the loaded skill's instructions are complete, continue with the next step below.

After /office-hours completes, re-run the design doc check:

setopt +o nomatch 2>/dev/null || true  # zsh compat
SLUG=$(~/.claude/skills/gstack/browse/bin/remote-slug 2>/dev/null || basename "$(git rev-parse --show-toplevel 2>/dev/null || pwd)")
BRANCH=$(git rev-parse --abbrev-ref HEAD 2>/dev/null | tr '/' '-' || echo 'no-branch')
DESIGN=$(ls -t ~/.gstack/projects/$SLUG/*-$BRANCH-design-*.md 2>/dev/null | head -1)
[ -z "$DESIGN" ] && DESIGN=$(ls -t ~/.gstack/projects/$SLUG/*-design-*.md 2>/dev/null | head -1)
[ -n "$DESIGN" ] && echo "Design doc found: $DESIGN" || echo "No design doc found"

If a design doc is now found, read it and continue the review. If none was produced (user may have cancelled), proceed with standard review.

/autoplan — Auto-Review Pipeline

One command. Rough plan in, fully reviewed plan out.

/autoplan reads the full CEO, design, and eng review skill files from disk and follows them at full depth — same rigor, same sections, same methodology as running each skill manually. The only difference: intermediate AskUserQuestion calls are auto-decided using the 6 principles below. Taste decisions (where reasonable people could disagree) are surfaced at a final approval gate.

The 6 Decision Principles

These rules auto-answer every intermediate question:

1. Choose completeness — Ship the whole thing. Pick the approach that covers more edge cases.
2. Boil lakes — Fix everything in the blast radius (files modified by this plan + direct importers). Auto-approve expansions that are in blast radius AND < 1 day CC effort (< 5 files, no new infra).
3. Pragmatic — If two options fix the same thing, pick the cleaner one. 5 seconds choosing, not 5 minutes.
4. DRY — Duplicates existing functionality? Reject. Reuse what exists.
5. Explicit over clever — 10-line obvious fix > 200-line abstraction. Pick what a new contributor reads in 30 seconds.
6. Bias toward action — Merge > review cycles > stale deliberation. Flag concerns but don't block.

Conflict resolution (context-dependent tiebreakers):

• CEO phase: P1 (completeness) + P2 (boil lakes) dominate.
• Eng phase: P5 (explicit) + P3 (pragmatic) dominate.
• Design phase: P5 (explicit) + P1 (completeness) dominate.

Decision Classification

Every auto-decision is classified:

Mechanical — one clearly right answer. Auto-decide silently. Examples: run codex (always yes), run evals (always yes), reduce scope on a complete plan (always no).

Taste — reasonable people could disagree. Auto-decide with recommendation, but surface at the final gate. Three natural sources:

1. Close approaches — top two are both viable with different tradeoffs.
2. Borderline scope — in blast radius but 3-5 files, or ambiguous radius.
3. Codex disagreements — codex recommends differently and has a valid point.

User Challenge — both models agree the user's stated direction should change. This is qualitatively different from taste decisions. When Claude and Codex both recommend merging, splitting, adding, or removing features/skills/workflows that the user specified, this is a User Challenge. It is NEVER auto-decided.

User Challenges go to the final approval gate with richer context than taste decisions:

• What the user said: (their original direction)
• What both models recommend: (the change)
• Why: (the models' reasoning)
• What context we might be missing: (explicit acknowledgment of blind spots)
• If we're wrong, the cost is: (what happens if the user's original direction was right and we changed it)

The user's original direction is the default. The models must make the case for change, not the other way around.

Exception: If both models flag the change as a security vulnerability or feasibility blocker (not a preference), the AskUserQuestion framing explicitly warns: "Both models believe this is a security/feasibility risk, not just a preference." The user still decides, but the framing is appropriately urgent.

Sequential Execution — MANDATORY

Phases MUST execute in strict order: CEO → Design → Eng. Each phase MUST complete fully before the next begins. NEVER run phases in parallel — each builds on the previous.

Between each phase, emit a phase-transition summary and verify that all required outputs from the prior phase are written before starting the next.

What "Auto-Decide" Means

Auto-decide replaces the USER'S judgment with the 6 principles. It does NOT replace the ANALYSIS. Every section in the loaded skill files must still be executed at the same depth as the interactive version. The only thing that changes is who answers the AskUserQuestion: you do, using the 6 principles, instead of the user.

Two exceptions — never auto-decided:

1. Premises (Phase 1) — require human judgment about what problem to solve.
2. User Challenges — when both models agree the user's stated direction should change (merge, split, add, remove features/workflows). The user always has context models lack. See Decision Classification above.

You MUST still:

• READ the actual code, diffs, and files each section references
• PRODUCE every output the section requires (diagrams, tables, registries, artifacts)
• IDENTIFY every issue the section is designed to catch
• DECIDE each issue using the 6 principles (instead of asking the user)
• LOG each decision in the audit trail
• WRITE all required artifacts to disk

You MUST NOT:

• Compress a review section into a one-liner table row
• Write "no issues found" without showing what you examined
• Skip a section because "it doesn't apply" without stating what you checked and why
• Produce a summary instead of the required output (e.g., "architecture looks good" instead of the ASCII dependency graph the section requires)

"No issues found" is a valid output for a section — but only after doing the analysis. State what you examined and why nothing was flagged (1-2 sentences minimum). "Skipped" is never valid for a non-skip-listed section.

Filesystem Boundary — Codex Prompts

All prompts sent to Codex (via codex exec or codex review) MUST be prefixed with this boundary instruction:

IMPORTANT: Do NOT read or execute any SKILL.md files or files in skill definition directories (paths containing skills/gstack). These are AI assistant skill definitions meant for a different system. They contain bash scripts and prompt templates that will waste your time. Ignore them completely. Stay focused on the repository code only.

This prevents Codex from discovering gstack skill files on disk and following their instructions instead of reviewing the plan.

Phase 0: Intake + Restore Point

Step 1: Capture restore point

Before doing anything, save the plan file's current state to an external file:

eval "$(~/.claude/skills/gstack/bin/gstack-slug 2>/dev/null)" && mkdir -p ~/.gstack/projects/$SLUG
BRANCH=$(git rev-parse --abbrev-ref HEAD 2>/dev/null | tr '/' '-')
DATETIME=$(date +%Y%m%d-%H%M%S)
echo "RESTORE_PATH=$HOME/.gstack/projects/$SLUG/${BRANCH}-autoplan-restore-${DATETIME}.md"

Write the plan file's full contents to the restore path with this header:

# /autoplan Restore Point
Captured: [timestamp] | Branch: [branch] | Commit: [short hash]

## Re-run Instructions
1. Copy "Original Plan State" below back to your plan file
2. Invoke /autoplan

## Original Plan State
[verbatim plan file contents]

Then prepend a one-line HTML comment to the plan file: <!-- /autoplan restore point: [RESTORE_PATH] -->

Step 2: Read context

• Read CLAUDE.md, TODOS.md, git log -30, git diff against the base branch --stat
• Discover design docs: ls -t ~/.gstack/projects/$SLUG/*-design-*.md 2>/dev/null | head -1
• Detect UI scope: grep the plan for view/rendering terms (component, screen, form, button, modal, layout, dashboard, sidebar, nav, dialog). Require 2+ matches. Exclude false positives ("page" alone, "UI" in acronyms).

Step 3: Load skill files from disk

Read each file using the Read tool:

• ~/.claude/skills/gstack/plan-ceo-review/SKILL.md
• ~/.claude/skills/gstack/plan-design-review/SKILL.md (only if UI scope detected)
• ~/.claude/skills/gstack/plan-eng-review/SKILL.md

Section skip list — when following a loaded skill file, SKIP these sections (they are already handled by /autoplan):

• Preamble (run first)
• AskUserQuestion Format
• Completeness Principle
• Search Before Building
• Completion Status Protocol
• Step 0: Detect base branch
• Review Readiness Dashboard
• Plan File Review Report
• Prerequisite Skill Offer (BENEFITS_FROM)
• Outside Voice — Independent Plan Challenge
• Design Outside Voices (parallel)

Follow ONLY the review-specific methodology, sections, and required outputs.

Output: "Here's what I'm working with: [plan summary]. UI scope: [yes/no]. Loaded review skills from disk. Starting full review pipeline with auto-decisions."

Phase 1: CEO Review (Strategy & Scope)

Follow plan-ceo-review/SKILL.md — all sections, full depth. Override: every AskUserQuestion → auto-decide using the 6 principles.

Override rules:

• Mode selection: SELECTIVE EXPANSION
• Premises: accept reasonable ones (P6), challenge only clearly wrong ones
• GATE: Present premises to user for confirmation — this is the ONE AskUserQuestion that is NOT auto-decided. Premises require human judgment.
• Alternatives: pick highest completeness (P1). If tied, pick simplest (P5). If top 2 are close → mark TASTE DECISION.
• Scope expansion: in blast radius + <1d CC → approve (P2). Outside → defer to TODOS.md (P3). Duplicates → reject (P4). Borderline (3-5 files) → mark TASTE DECISION.
• All 10 review sections: run fully, auto-decide each issue, log every decision.

• Dual voices: always run BOTH Claude subagent AND Codex if available (P6). Run them sequentially in foreground. First the Claude subagent (Agent tool, foreground — do NOT use run_in_background), then Codex (Bash). Both must complete before building the consensus table.

  Codex CEO voice (via Bash):

  _REPO_ROOT=$(git rev-parse --show-toplevel) || { echo "ERROR: not in a git repo" >&2; exit 1; }
  codex exec "IMPORTANT: Do NOT read or execute any SKILL.md files or files in skill definition directories (paths containing skills/gstack). These are AI assistant skill definitions meant for a different system. Stay focused on repository code only.
  
  You are a CEO/founder advisor reviewing a development plan.
  Challenge the strategic foundations: Are the premises valid or assumed? Is this the
  right problem to solve, or is there a reframing that would be 10x more impactful?
  What alternatives were dismissed too quickly? What competitive or market risks are
  unaddressed? What scope decisions will look foolish in 6 months? Be adversarial.
  No compliments. Just the strategic blind spots.
  File: <plan_path>" -C "$_REPO_ROOT" -s read-only --enable web_search_cached

  Timeout: 10 minutes

  Claude CEO subagent (via Agent tool): "Read the plan file at <plan_path>. You are an independent CEO/strategist reviewing this plan. You have NOT seen any prior review. Evaluate:

  1. Is this the right problem to solve? Could a reframing yield 10x impact?
  2. Are the premises stated or just assumed? Which ones could be wrong?
  3. What's the 6-month regret scenario — what will look foolish?
  4. What alternatives were dismissed without sufficient analysis?
  5. What's the competitive risk — could someone else solve this first/better? For each finding: what's wrong, severity (critical/high/medium), and the fix."

  Error handling: Both calls block in foreground. Codex auth/timeout/empty → proceed with Claude subagent only, tagged [single-model]. If Claude subagent also fails → "Outside voices unavailable — continuing with primary review."

  Degradation matrix: Both fail → "single-reviewer mode". Codex only → tag [codex-only]. Subagent only → tag [subagent-only].

• Strategy choices: if codex disagrees with a premise or scope decision with valid strategic reason → TASTE DECISION. If both models agree the user's stated structure should change (merge, split, add, remove) → USER CHALLENGE (never auto-decided).

Required execution checklist (CEO):

Step 0 (0A-0F) — run each sub-step and produce:

• 0A: Premise challenge with specific premises named and evaluated
• 0B: Existing code leverage map (sub-problems → existing code)
• 0C: Dream state diagram (CURRENT → THIS PLAN → 12-MONTH IDEAL)
• 0C-bis: Implementation alternatives table (2-3 approaches with effort/risk/pros/cons)
• 0D: Mode-specific analysis with scope decisions logged
• 0E: Temporal interrogation (HOUR 1 → HOUR 6+)
• 0F: Mode selection confirmation

Step 0.5 (Dual Voices): Run Claude subagent (foreground Agent tool) first, then Codex (Bash). Present Codex output under CODEX SAYS (CEO — strategy challenge) header. Present subagent output under CLAUDE SUBAGENT (CEO — strategic independence) header. Produce CEO consensus table:

CEO DUAL VOICES — CONSENSUS TABLE:
═══════════════════════════════════════════════════════════════
  Dimension                           Claude  Codex  Consensus
  ──────────────────────────────────── ─────── ─────── ─────────
  1. Premises valid?                   —       —      —
  2. Right problem to solve?           —       —      —
  3. Scope calibration correct?        —       —      —
  4. Alternatives sufficiently explored?—      —      —
  5. Competitive/market risks covered? —       —      —
  6. 6-month trajectory sound?         —       —      —
═══════════════════════════════════════════════════════════════
CONFIRMED = both agree. DISAGREE = models differ (→ taste decision).
Missing voice = N/A (not CONFIRMED). Single critical finding from one voice = flagged regardless.

Sections 1-10 — for EACH section, run the evaluation criteria from the loaded skill file:

• Sections WITH findings: full analysis, auto-decide each issue, log to audit trail
• Sections with NO findings: 1-2 sentences stating what was examined and why nothing was flagged. NEVER compress a section to just its name in a table row.
• Section 11 (Design): run only if UI scope was detected in Phase 0

Mandatory outputs from Phase 1:

• "NOT in scope" section with deferred items and rationale
• "What already exists" section mapping sub-problems to existing code
• Error & Rescue Registry table (from Section 2)
• Failure Modes Registry table (from review sections)
• Dream state delta (where this plan leaves us vs 12-month ideal)
• Completion Summary (the full summary table from the CEO skill)

PHASE 1 COMPLETE. Emit phase-transition summary:

Phase 1 complete. Codex: [N concerns]. Claude subagent: [N issues]. Consensus: [X/6 confirmed, Y disagreements → surfaced at gate]. Passing to Phase 2.

Do NOT begin Phase 2 until all Phase 1 outputs are written to the plan file and the premise gate has been passed.

Pre-Phase 2 checklist (verify before starting):

• CEO completion summary written to plan file
• CEO dual voices ran (Codex + Claude subagent, or noted unavailable)
• CEO consensus table produced
• Premise gate passed (user confirmed)
• Phase-transition summary emitted

Phase 2: Design Review (conditional — skip if no UI scope)

Follow plan-design-review/SKILL.md — all 7 dimensions, full depth. Override: every AskUserQuestion → auto-decide using the 6 principles.

Override rules:

• Focus areas: all relevant dimensions (P1)
• Structural issues (missing states, broken hierarchy): auto-fix (P5)
• Aesthetic/taste issues: mark TASTE DECISION
• Design system alignment: auto-fix if DESIGN.md exists and fix is obvious

• Dual voices: always run BOTH Claude subagent AND Codex if available (P6).

  Codex design voice (via Bash):

  _REPO_ROOT=$(git rev-parse --show-toplevel) || { echo "ERROR: not in a git repo" >&2; exit 1; }
  codex exec "IMPORTANT: Do NOT read or execute any SKILL.md files or files in skill definition directories (paths containing skills/gstack). These are AI assistant skill definitions meant for a different system. Stay focused on repository code only.
  
  Read the plan file at <plan_path>. Evaluate this plan's
  UI/UX design decisions.
  
  Also consider these findings from the CEO review phase:
  <insert CEO dual voice findings summary — key concerns, disagreements>
  
  Does the information hierarchy serve the user or the developer? Are interaction
  states (loading, empty, error, partial) specified or left to the implementer's
  imagination? Is the responsive strategy intentional or afterthought? Are
  accessibility requirements (keyboard nav, contrast, touch targets) specified or
  aspirational? Does the plan describe specific UI decisions or generic patterns?
  What design decisions will haunt the implementer if left ambiguous?
  Be opinionated. No hedging." -C "$_REPO_ROOT" -s read-only --enable web_search_cached

  Timeout: 10 minutes

  Claude design subagent (via Agent tool): "Read the plan file at <plan_path>. You are an independent senior product designer reviewing this plan. You have NOT seen any prior review. Evaluate:

  1. Information hierarchy: what does the user see first, second, third? Is it right?
  2. Missing states: loading, empty, error, success, partial — which are unspecified?
  3. User journey: what's the emotional arc? Where does it break?
  4. Specificity: does the plan describe SPECIFIC UI or generic patterns?
  5. What design decisions will haunt the implementer if left ambiguous? For each finding: what's wrong, severity (critical/high/medium), and the fix." NO prior-phase context — subagent must be truly independent.

  Error handling: same as Phase 1 (both foreground/blocking, degradation matrix applies).

• Design choices: if codex disagrees with a design decision with valid UX reasoning → TASTE DECISION. Scope changes both models agree on → USER CHALLENGE.

Required execution checklist (Design):

1. Step 0 (Design Scope): Rate completeness 0-10. Check DESIGN.md. Map existing patterns.
2. Step 0.5 (Dual Voices): Run Claude subagent (foreground) first, then Codex. Present under CODEX SAYS (design — UX challenge) and CLAUDE SUBAGENT (design — independent review) headers. Produce design litmus scorecard (consensus table). Use the litmus scorecard format from plan-design-review. Include CEO phase findings in Codex prompt ONLY (not Claude subagent — stays independent).
3. Passes 1-7: Run each from loaded skill. Rate 0-10. Auto-decide each issue. DISAGREE items from scorecard → raised in the relevant pass with both perspectives.

PHASE 2 COMPLETE. Emit phase-transition summary:

Phase 2 complete. Codex: [N concerns]. Claude subagent: [N issues]. Consensus: [X/Y confirmed, Z disagreements → surfaced at gate]. Passing to Phase 3.

Do NOT begin Phase 3 until all Phase 2 outputs (if run) are written to the plan file.

Pre-Phase 3 checklist (verify before starting):

• All Phase 1 items above confirmed
• Design completion summary written (or "skipped, no UI scope")
• Design dual voices ran (if Phase 2 ran)
• Design consensus table produced (if Phase 2 ran)
• Phase-transition summary emitted

Phase 3: Eng Review + Dual Voices

Follow plan-eng-review/SKILL.md — all sections, full depth. Override: every AskUserQuestion → auto-decide using the 6 principles.

Override rules:

• Scope challenge: never reduce (P2)

• Dual voices: always run BOTH Claude subagent AND Codex if available (P6).

  Codex eng voice (via Bash):

  _REPO_ROOT=$(git rev-parse --show-toplevel) || { echo "ERROR: not in a git repo" >&2; exit 1; }
  codex exec "IMPORTANT: Do NOT read or execute any SKILL.md files or files in skill definition directories (paths containing skills/gstack). These are AI assistant skill definitions meant for a different system. Stay focused on repository code only.
  
  Review this plan for architectural issues, missing edge cases,
  and hidden complexity. Be adversarial.
  
  Also consider these findings from prior review phases:
  CEO: <insert CEO consensus table summary — key concerns, DISAGREEs>
  Design: <insert Design consensus table summary, or 'skipped, no UI scope'>
  
  File: <plan_path>" -C "$_REPO_ROOT" -s read-only --enable web_search_cached

  Timeout: 10 minutes

  Claude eng subagent (via Agent tool): "Read the plan file at <plan_path>. You are an independent senior engineer reviewing this plan. You have NOT seen any prior review. Evaluate:

  1. Architecture: Is the component structure sound? Coupling concerns?
  2. Edge cases: What breaks under 10x load? What's the nil/empty/error path?
  3. Tests: What's missing from the test plan? What would break at 2am Friday?
  4. Security: New attack surface? Auth boundaries? Input validation?
  5. Hidden complexity: What looks simple but isn't? For each finding: what's wrong, severity, and the fix." NO prior-phase context — subagent must be truly independent.

  Error handling: same as Phase 1 (both foreground/blocking, degradation matrix applies).

• Architecture choices: explicit over clever (P5). If codex disagrees with valid reason → TASTE DECISION. Scope changes both models agree on → USER CHALLENGE.
• Evals: always include all relevant suites (P1)
• Test plan: generate artifact at ~/.gstack/projects/$SLUG/{user}-{branch}-test-plan-{datetime}.md
• TODOS.md: collect all deferred scope expansions from Phase 1, auto-write

Required execution checklist (Eng):

1. Step 0 (Scope Challenge): Read actual code referenced by the plan. Map each sub-problem to existing code. Run the complexity check. Produce concrete findings.
2. Step 0.5 (Dual Voices): Run Claude subagent (foreground) first, then Codex. Present Codex output under CODEX SAYS (eng — architecture challenge) header. Present subagent output under CLAUDE SUBAGENT (eng — independent review) header. Produce eng consensus table:

ENG DUAL VOICES — CONSENSUS TABLE:
═══════════════════════════════════════════════════════════════
  Dimension                           Claude  Codex  Consensus
  ──────────────────────────────────── ─────── ─────── ─────────
  1. Architecture sound?               —       —      —
  2. Test coverage sufficient?         —       —      —
  3. Performance risks addressed?      —       —      —
  4. Security threats covered?         —       —      —
  5. Error paths handled?              —       —      —
  6. Deployment risk manageable?       —       —      —
═══════════════════════════════════════════════════════════════
CONFIRMED = both agree. DISAGREE = models differ (→ taste decision).
Missing voice = N/A (not CONFIRMED). Single critical finding from one voice = flagged regardless.

3. Section 1 (Architecture): Produce ASCII dependency graph showing new components and their relationships to existing ones. Evaluate coupling, scaling, security.
4. Section 2 (Code Quality): Identify DRY violations, naming issues, complexity. Reference specific files and patterns. Auto-decide each finding.
5. Section 3 (Test Review) — NEVER SKIP OR COMPRESS. This section requires reading actual code, not summarizing from memory.
   • Read the diff or the plan's affected files
   • Build the test diagram: list every NEW UX flow, data flow, codepath, and branch
   • For EACH item in the diagram: what type of test covers it? Does one exist? Gaps?
   • For LLM/prompt changes: which eval suites must run?
   • Auto-deciding test gaps means: identify the gap → decide whether to add a test or defer (with rationale and principle) → log the decision. It does NOT mean skipping the analysis.
   • Write the test plan artifact to disk
6. Section 4 (Performance): Evaluate N+1 queries, memory, caching, slow paths.

Mandatory outputs from Phase 3:

• "NOT in scope" section
• "What already exists" section
• Architecture ASCII diagram (Section 1)
• Test diagram mapping codepaths to coverage (Section 3)
• Test plan artifact written to disk (Section 3)
• Failure modes registry with critical gap flags
• Completion Summary (the full summary from the Eng skill)
• TODOS.md updates (collected from all phases)

Decision Audit Trail

After each auto-decision, append a row to the plan file using Edit:

<!-- AUTONOMOUS DECISION LOG -->
## Decision Audit Trail

| # | Phase | Decision | Classification | Principle | Rationale | Rejected |
|---|-------|----------|-----------|-----------|----------|

Write one row per decision incrementally (via Edit). This keeps the audit on disk, not accumulated in conversation context.

Pre-Gate Verification

Before presenting the Final Approval Gate, verify that required outputs were actually produced. Check the plan file and conversation for each item.

Phase 1 (CEO) outputs:

• Premise challenge with specific premises named (not just "premises accepted")
• All applicable review sections have findings OR explicit "examined X, nothing flagged"
• Error & Rescue Registry table produced (or noted N/A with reason)
• Failure Modes Registry table produced (or noted N/A with reason)
• "NOT in scope" section written
• "What already exists" section written
• Dream state delta written
• Completion Summary produced
• Dual voices ran (Codex + Claude subagent, or noted unavailable)
• CEO consensus table produced

Phase 2 (Design) outputs — only if UI scope detected:

• All 7 dimensions evaluated with scores
• Issues identified and auto-decided
• Dual voices ran (or noted unavailable/skipped with phase)
• Design litmus scorecard produced

Phase 3 (Eng) outputs:

• Scope challenge with actual code analysis (not just "scope is fine")
• Architecture ASCII diagram produced
• Test diagram mapping codepaths to test coverage
• Test plan artifact written to disk at ~/.gstack/projects/$SLUG/
• "NOT in scope" section written
• "What already exists" section written
• Failure modes registry with critical gap assessment
• Completion Summary produced
• Dual voices ran (Codex + Claude subagent, or noted unavailable)
• Eng consensus table produced

Cross-phase:

• Cross-phase themes section written

Audit trail:

• Decision Audit Trail has at least one row per auto-decision (not empty)

If ANY checkbox above is missing, go back and produce the missing output. Max 2 attempts — if still missing after retrying twice, proceed to the gate with a warning noting which items are incomplete. Do not loop indefinitely.

Phase 4: Final Approval Gate

STOP here and present the final state to the user.

Present as a message, then use AskUserQuestion:

## /autoplan Review Complete

### Plan Summary
[1-3 sentence summary]

### Decisions Made: [N] total ([M] auto-decided, [K] taste choices, [J] user challenges)

### User Challenges (both models disagree with your stated direction)
[For each user challenge:]
**Challenge [N]: [title]** (from [phase])
You said: [user's original direction]
Both models recommend: [the change]
Why: [reasoning]
What we might be missing: [blind spots]
If we're wrong, the cost is: [downside of changing]
[If security/feasibility: "⚠️ Both models flag this as a security/feasibility risk,
not just a preference."]

Your call — your original direction stands unless you explicitly change it.

### Your Choices (taste decisions)
[For each taste decision:]
**Choice [N]: [title]** (from [phase])
I recommend [X] — [principle]. But [Y] is also viable:
  [1-sentence downstream impact if you pick Y]

### Auto-Decided: [M] decisions [see Decision Audit Trail in plan file]

### Review Scores
- CEO: [summary]
- CEO Voices: Codex [summary], Claude subagent [summary], Consensus [X/6 confirmed]
- Design: [summary or "skipped, no UI scope"]
- Design Voices: Codex [summary], Claude subagent [summary], Consensus [X/7 confirmed] (or "skipped")
- Eng: [summary]
- Eng Voices: Codex [summary], Claude subagent [summary], Consensus [X/6 confirmed]

### Cross-Phase Themes
[For any concern that appeared in 2+ phases' dual voices independently:]
**Theme: [topic]** — flagged in [Phase 1, Phase 3]. High-confidence signal.
[If no themes span phases:] "No cross-phase themes — each phase's concerns were distinct."

### Deferred to TODOS.md
[Items auto-deferred with reasons]

Cognitive load management:

• 0 user challenges: skip "User Challenges" section
• 0 taste decisions: skip "Your Choices" section
• 1-7 taste decisions: flat list
• 8+: group by phase. Add warning: "This plan had unusually high ambiguity ([N] taste decisions). Review carefully."

AskUserQuestion options:

• A) Approve as-is (accept all recommendations)
• B) Approve with overrides (specify which taste decisions to change)
• B2) Approve with user challenge responses (accept or reject each challenge)
• C) Interrogate (ask about any specific decision)
• D) Revise (the plan itself needs changes)
• E) Reject (start over)

Option handling:

• A: mark APPROVED, write review logs, suggest /ship
• B: ask which overrides, apply, re-present gate
• C: answer freeform, re-present gate
• D: make changes, re-run affected phases (scope→1B, design→2, test plan→3, arch→3). Max 3 cycles.
• E: start over

Completion: Write Review Logs

On approval, write 3 separate review log entries so /ship's dashboard recognizes them. Replace TIMESTAMP, STATUS, and N with actual values from each review phase. STATUS is "clean" if no unresolved issues, "issues_open" otherwise.

COMMIT=$(git rev-parse --short HEAD 2>/dev/null)
TIMESTAMP=$(date -u +%Y-%m-%dT%H:%M:%SZ)

~/.claude/skills/gstack/bin/gstack-review-log '{"skill":"plan-ceo-review","timestamp":"'"$TIMESTAMP"'","status":"STATUS","unresolved":N,"critical_gaps":N,"mode":"SELECTIVE_EXPANSION","via":"autoplan","commit":"'"$COMMIT"'"}'

~/.claude/skills/gstack/bin/gstack-review-log '{"skill":"plan-eng-review","timestamp":"'"$TIMESTAMP"'","status":"STATUS","unresolved":N,"critical_gaps":N,"issues_found":N,"mode":"FULL_REVIEW","via":"autoplan","commit":"'"$COMMIT"'"}'

If Phase 2 ran (UI scope):

~/.claude/skills/gstack/bin/gstack-review-log '{"skill":"plan-design-review","timestamp":"'"$TIMESTAMP"'","status":"STATUS","unresolved":N,"via":"autoplan","commit":"'"$COMMIT"'"}'

Dual voice logs (one per phase that ran):

~/.claude/skills/gstack/bin/gstack-review-log '{"skill":"autoplan-voices","timestamp":"'"$TIMESTAMP"'","status":"STATUS","source":"SOURCE","phase":"ceo","via":"autoplan","consensus_confirmed":N,"consensus_disagree":N,"commit":"'"$COMMIT"'"}'

~/.claude/skills/gstack/bin/gstack-review-log '{"skill":"autoplan-voices","timestamp":"'"$TIMESTAMP"'","status":"STATUS","source":"SOURCE","phase":"eng","via":"autoplan","consensus_confirmed":N,"consensus_disagree":N,"commit":"'"$COMMIT"'"}'

If Phase 2 ran (UI scope), also log:

~/.claude/skills/gstack/bin/gstack-review-log '{"skill":"autoplan-voices","timestamp":"'"$TIMESTAMP"'","status":"STATUS","source":"SOURCE","phase":"design","via":"autoplan","consensus_confirmed":N,"consensus_disagree":N,"commit":"'"$COMMIT"'"}'

SOURCE = "codex+subagent", "codex-only", "subagent-only", or "unavailable". Replace N values with actual consensus counts from the tables.

Suggest next step: /ship when ready to create the PR.

Important Rules

• Never abort. The user chose /autoplan. Respect that choice. Surface all taste decisions, never redirect to interactive review.
• Two gates. The non-auto-decided AskUserQuestions are: (1) premise confirmation in Phase 1, and (2) User Challenges — when both models agree the user's stated direction should change. Everything else is auto-decided using the 6 principles.
• Log every decision. No silent auto-decisions. Every choice gets a row in the audit trail.
• Full depth means full depth. Do not compress or skip sections from the loaded skill files (except the skip list in Phase 0). "Full depth" means: read the code the section asks you to read, produce the outputs the section requires, identify every issue, and decide each one. A one-sentence summary of a section is not "full depth" — it is a skip. If you catch yourself writing fewer than 3 sentences for any review section, you are likely compressing.
• Artifacts are deliverables. Test plan artifact, failure modes registry, error/rescue table, ASCII diagrams — these must exist on disk or in the plan file when the review completes. If they don't exist, the review is incomplete.
• Sequential order. CEO → Design → Eng. Each phase builds on the last.