summarize-task

Close a task: capture what actually happened (often different from the plan), flip checkboxes, advance STATE.md. Produces an append-to-history artifact future sessions can read.

Anti-Pattern: "The task is done, I don't need a summary"

Without a summary, the next session has no way to know this task happened -- STATE.md wasn't updated, the slice-plan checkbox is still [ ], and the next agent will either redo the work or get confused. The summary is the closure signal. Always write it, even for one-line tasks ("CSS tweak -- shipped in one commit, no follow-up needed").

Checklist

You MUST create a TodoWrite task for each of these items:

1. Run preamble -- detect active task + plan file
2. HARD-GATE: active task must exist -- abort if none
3. Read the plan -- show user the original scope
4. Ask outcome -- what actually shipped
5. Ask deviations -- what differed from plan (if anything)
6. Ask follow-ups -- new tasks / decisions surfaced during execution
7. Ask verification result -- did the verification command pass?
8. Write M###-S##-T##-SUMMARY.md
9. Flip slice-plan checkbox [ ] → [x]
10. Update STATE.md -- clear active_task, bump counts, update status line
11. Offer git stage -- ask if user wants git-add of touched files
12. Report + return -- suggest next task or slice-close

Preamble

_PROJECT_DIR="${CLAUDE_PROJECT_DIR:-$PWD}"
cd "$_PROJECT_DIR" 2>/dev/null || true
_PROJECT_SLUG=$(basename "$(git rev-parse --show-toplevel 2>/dev/null)" 2>/dev/null || basename "$(pwd)")

if [ -d "$_PROJECT_DIR/.ytstack" ]; then
  _YT_DIR="$_PROJECT_DIR/.ytstack"
elif [ -d "$HOME/.ytstack/projects/$_PROJECT_SLUG" ]; then
  _YT_DIR="$HOME/.ytstack/projects/$_PROJECT_SLUG"
else
  _YT_DIR=""
fi

_HAS_YTSTACK=$([ -n "$_YT_DIR" ] && echo yes || echo no)

_NON_INTERACTIVE=false
if [ -n "$YTSTACK_NON_INTERACTIVE" ] || [ -n "$OPENCLAW_SESSION" ] || [ -n "$CLAUDE_AGENT_TEAM_MEMBER" ]; then
  _NON_INTERACTIVE=true
fi

_CURRENT_MILESTONE=none
_ACTIVE_SLICE=none
_ACTIVE_TASK=none
if [ -f "$_YT_DIR/STATE.md" ]; then
  _CURRENT_MILESTONE=$(sed -n 's/^current_milestone: *//p' "$_YT_DIR/STATE.md" | head -1)
  _ACTIVE_SLICE=$(sed -n 's/^active_slice: *//p' "$_YT_DIR/STATE.md" | head -1)
  _ACTIVE_TASK=$(sed -n 's/^active_task: *//p' "$_YT_DIR/STATE.md" | head -1)
fi

_PLAN_FILE="$_YT_DIR/$_CURRENT_MILESTONE-$_ACTIVE_SLICE-$_ACTIVE_TASK-PLAN.md"
_SLICE_PLAN="$_YT_DIR/$_CURRENT_MILESTONE-$_ACTIVE_SLICE-PLAN.md"
_IS_GIT=$([ -d .git ] && echo yes || echo no)

# Gather this task's commits for a durable, committed `## Commits` section.
# ytstack's commit convention prefixes task commits with `M###-S##-T##:`
# (see CLAUDE.md), so grep the log for that ref. This is the SINGLE owner of
# commit-to-task linking; the post-tool-use-bash hook only drops a draft stub
# and never maintains a commit list (issue #22 / M015).
_TASK_REF="$_CURRENT_MILESTONE-$_ACTIVE_SLICE-$_ACTIVE_TASK"
_TASK_COMMITS=""
if [ "$_IS_GIT" = yes ]; then
  _TASK_COMMITS=$(git log --no-merges --pretty=format:'- `%h` -- %s' --grep "^$_TASK_REF" 2>/dev/null)
fi

echo "HAS_YTSTACK: $_HAS_YTSTACK"
echo "YTSTACK_NON_INTERACTIVE: $_NON_INTERACTIVE"
echo "CURRENT_MILESTONE: $_CURRENT_MILESTONE"
echo "ACTIVE_SLICE: $_ACTIVE_SLICE"
echo "ACTIVE_TASK: $_ACTIVE_TASK"
echo "PLAN_FILE: $_PLAN_FILE"
echo "SLICE_PLAN: $_SLICE_PLAN"
echo "IS_GIT: $_IS_GIT"
echo "TASK_COMMITS_BEGIN"
echo "${_TASK_COMMITS:-(none found for $_TASK_REF)}"
echo "TASK_COMMITS_END"

Procedure

Step 2: HARD-GATE

If any of HAS_YTSTACK / CURRENT_MILESTONE / ACTIVE_SLICE / ACTIVE_TASK is no / none:

"No active task to summarize. Check STATE.md and run the preceding skill (plan-task / slice-milestone / plan-milestone / init-project) as needed." STOP.

If PLAN_FILE does not exist:

"STATE.md says active_task={ACTIVE_TASK} but plan file missing at {PLAN_FILE}. Repair manually before summarizing." STOP.

Step 3: Read the plan

Read {PLAN_FILE}. Extract Summary, Files, Verification. Show:

Closing {CURRENT_MILESTONE}-{ACTIVE_SLICE}-{ACTIVE_TASK}.

Original plan: {SUMMARY} Files planned: {FILE_LIST} Verification: {VERIFICATION_CMD}

Step 4: Ask outcome

Use AskUserQuestion (open-ended):

What actually shipped? 2-4 sentences. Use past tense. Say what the code does now, not what you did to it.

Good: "Signup form validates email client-side and POSTs JSON to /api/signup. Server hashes with argon2 and inserts user row. Returns 201 with session cookie. Duplicate email returns 409."

Bad: "I implemented signup" -- too vague, not useful to future sessions.

Remember as _OUTCOME.

Step 5: Ask deviations

Use AskUserQuestion (open-ended):

Did anything differ from the plan? Extra files, skipped features, refactors, new dependencies?

Enter "none" if the plan held up.

Remember as _DEVIATIONS.

Step 6: Ask follow-ups

Use AskUserQuestion (open-ended):

Anything that surfaced during execution that needs follow-up? Add them as:

• new tasks (get added to next slice or a new slice)
• decisions to lock in DECISIONS.md
• patterns worth capturing in KNOWLEDGE.md
• items to flag in REVIEW-NOTES.md for end-of-cycle

Enter "none" if clean.

Remember as _FOLLOWUPS.

Step 7: Ask verification result

Use AskUserQuestion (multi-choice):

Did the plan's verification step pass?

Verification was: {VERIFICATION_CMD}

A) Passed -- clean exit, expected output. (Completeness: 10/10) B) Passed with caveats -- exits 0 but something's off. (Completeness: 7/10, flag in followups) C) Failed -- task not actually done. (Completeness: 0/10, do not close)

If C: do NOT proceed. Re-execute the task until it passes, then re-run this skill.

If C: STOP. Do not write the summary.

Remember as _VERIFICATION_RESULT (value: passed / passed_with_caveats).

Step 8: Write M###-S##-T##-SUMMARY.md

---
milestone: {CURRENT_MILESTONE}
slice: {ACTIVE_SLICE}
task: {ACTIVE_TASK}
project: {PROJECT_NAME}
closed: {ISO_TIMESTAMP}
verification: {VERIFICATION_RESULT}
---

# {CURRENT_MILESTONE}-{ACTIVE_SLICE}-{ACTIVE_TASK} -- Summary

## Commits

{The commit list captured between TASK_COMMITS_BEGIN / TASK_COMMITS_END in the preamble. If it reported "(none found ...)", write: "No commits matched `{TASK_REF}:` -- task shipped uncommitted or under a non-conventional message." This section replaces the throwaway hook draft; it is the durable commit-to-task link.}

## Outcome

{OUTCOME}

## Deviations from plan

{DEVIATIONS}

## Follow-ups

{FOLLOWUPS}

## Verification

Command: `{VERIFICATION_CMD}` -- {VERIFICATION_RESULT}.

Step 9: Flip slice-plan checkbox

Edit {SLICE_PLAN}. Replace:

- [ ] {ACTIVE_TASK} -- {TASK_DESC}

with:

- [x] {ACTIVE_TASK} -- {TASK_DESC}

Also bump completed_tasks in the slice-plan's frontmatter by 1.

Step 10: Update STATE.md

If YTSTACK_NON_INTERACTIVE is false (i.e. CLAUDE_AGENT_TEAM_MEMBER is unset), edit STATE.md frontmatter:

• active_task: {ACTIVE_TASK} → active_task: none
• If the slice is now fully complete (all tasks [x]): also active_slice: {ACTIVE_SLICE} → active_slice: none

If YTSTACK_NON_INTERACTIVE is true (running as swarm teammate): skip frontmatter writes. Log:

[ytstack:summarize-task] skipping STATE.md active_task/active_slice write -- running as swarm teammate (CLAUDE_AGENT_TEAM_MEMBER set)

Regardless of teammate mode:

• last_updated: ... → bump to current
• Status line → **Status:** {CURRENT_MILESTONE} / {ACTIVE_SLICE} -- {N}/{TOTAL} tasks done in slice. Next task: pick from slice-plan or run /ytstack:plan-task.

If the slice is now fully complete (all tasks [x]): update status to recommend /ytstack:reassess-roadmap.

Step 11: Offer git stage

If IS_GIT=yes, use AskUserQuestion:

Task closed. Want to stage the touched files for commit?

Files from plan: {FILE_LIST}

RECOMMENDATION: A if the files match the plan. B if you touched additional files (deviation case).

A) Stage the planned files -- git add {FILE_LIST} then you commit manually with a message B) Don't stage -- I'll handle it myself C) Stage all changes -- git add -A (use with caution; may include unintended files)

If A: run git add {FILE_LIST} and report git status output. If B: skip. If C: confirm once more (destructive-flavored), then git add -A + git status.

Step 12: Report + return

Report:

Task {ACTIVE_TASK} closed.

Summary at: {YT_DIR}/{CURRENT_MILESTONE}-{ACTIVE_SLICE}-{ACTIVE_TASK}-SUMMARY.md Slice-plan checkbox flipped. STATE.md: active_task cleared.

Next step:

• If slice has more tasks: /ytstack:plan-task for the next one
• If slice is complete: /ytstack:reassess-roadmap to check if plan still fits reality before moving to next slice
• If milestone is complete: flip milestone status in ROADMAP.md and run /ytstack:plan-milestone for the next

Terminal State

Valid terminal states:

• Return after summary file + slice-plan update + STATE.md update + optional git stage
• Abort on HARD-GATE failure (no active task / missing plan file)
• Abort on verification failure (C in Step 7) -- task stays open

Do NOT invoke plan-task, reassess-roadmap, or plan-milestone automatically.