Writing: read docs/skills/shared/writing-rule.md before you write a durable artifact.

/spike-close — Close a Spike via the Disposition Gate

The disposition gate prevents the worst-of-both case: a spike that "succeeded" but never decides what to do with the code, leaving half-shipped exploration in main. Every spike must close with one of two paths:

• PROMOTE — the hypothesis was confirmed; file a fresh [Feature] ticket so the work goes through the full production SDLC. The spike branch itself is NOT lifted into production — the new feature work re-implements based on the spike's findings.
• DISCARD — the hypothesis was rejected (or the answer is "we shouldn't do this"); delete the spike branch and write a memo at docs/spike-memos/<slug>.md so future-us doesn't re-explore the same ground.

Path resolution

Read the registry path via portfolio_registry, the per-project docs dir via portfolio_projects_dir, and the ideas backlog via portfolio_ideas_backlog — all from .claude/hooks/_lib-portfolio-paths.sh. Source the helper at the top of any bash block that touches those paths:

source "$(git rev-parse --show-toplevel)/.claude/hooks/_lib-read-config.sh"
source "$(git rev-parse --show-toplevel)/.claude/hooks/_lib-portfolio-paths.sh"
registry=$(portfolio_registry)

Defaults match today's single-fork layout. See docs/multi-project.md.

Usage

/spike-close --promote 142
/spike-close --discard 142
/spike-close --promote          # uses the active-ticket marker
/spike-close --discard

Process

1. Resolve the spike ticket

Two paths:

• If $ARGUMENTS includes a number (e.g. --promote 142 or --discard owner/repo#142), use that.
• Otherwise read the active-ticket marker of the working tree you are in (see /start-ticket "Read the active ticket") and use the ticket recorded there. If no marker resolves, ask:

Which spike are you closing? Pass --promote <number> or --discard <number>,
or run /start-ticket first.

2. Verify it really is a spike

Run gh issue view <number> --repo <owner/repo> --json title,labels,state,body. The skill proceeds if:

• title starts with [Spike], OR
• labels include spike

If the ticket is neither, refuse:

Issue {owner/repo}#{number} doesn't look like a spike (no [Spike] prefix,
no `spike` label). /spike-close is for spike disposition only — close
production-shaped tickets via the normal QA → Done flow.

If the ticket is already CLOSED, warn and ask whether to continue (the user may want to retroactively record disposition):

{owner/repo}#{number} is already closed. Continue and (a) file the follow-
up artefact only, or (b) abort? (continue / abort)

3. Branch on --promote vs --discard

3a. PROMOTE — three questions, then file a [Feature]

Ask one at a time:

i) Production-shaped feature title

The spike confirmed the hypothesis. What's the title of the production-
shaped feature ticket we're filing as the follow-up?

ii) Production-shaped scope

What's the scope for the production version? This is the user-facing
capability, not the spike's exploration goal.
(One paragraph or bullets.)

iii) What's NOT being carried over

What did the spike try that's NOT being lifted into production? (e.g.
"the prototype used in-memory storage; production needs Postgres",
"the spike skipped error handling — we'll add it in the feature".)

Then preview the [Feature] ticket and confirm. The body MUST include a "Spike findings" section that links back to the spike:

**[Feature] {title}**

## User Story
{prompted from the operator — same as /feature step 3a}

## Acceptance Criteria
- [ ] {prompted from the operator}

## Spike findings
This feature was promoted from {owner/repo}#{spike-number}.
The spike confirmed: {one-sentence summary of what the spike proved}.

What is NOT being carried over from the spike branch:
- {item 1}
- {item 2}

## Out of Scope
{or "—"}

After confirmation, create the follow-up feature via the tracker abstraction (tracker_create, #670 / AgDR-0072, extended by the #709 creator sweep) so it lands in this project's tracker. For a GitHub adopter this runs gh issue create exactly as before.

# Resolve the tracker lib (it lives in the ops fork's hooks dir) by walking up
# from the cwd; source it.
tracker_lib="$(r="$PWD"; while [ -n "$r" ] && [ "$r" != / ]; do \
  [ -f "$r/.claude/hooks/_lib-tracker.sh" ] && { echo "$r/.claude/hooks/_lib-tracker.sh"; break; }; \
  r="${r%/*}"; done)"
# shellcheck source=/dev/null
. "$tracker_lib"

body_file="$(mktemp)"
cat > "$body_file" <<'BODY'
{body}
BODY

# tracker_create <owner/repo> <title> <body_file> [<labels_csv>] → {"ref","url"}.
result="$(tracker_create "{owner/repo}" "[Feature] {title}" "$body_file" "enhancement")"
rc=$?
rm -f "$body_file"
if [ "$rc" -eq 3 ]; then
  echo "Tracker is 'none' (shape-only) — nothing was created in a tracker." >&2
  printf '%s\n' "$result"
  exit 0
elif [ "$rc" -ne 0 ] || [ -z "$result" ]; then
  echo "Follow-up creation failed — check the tracker CLI / auth. Nothing was created." >&2
  exit 1
fi

ref="$(printf '%s' "$result" | jq -r '.ref')"   # the new feature's reference
url="$(printf '%s' "$result" | jq -r '.url')"

Then close the spike with a cross-ref comment. (Closing stays on gh here — issue state transitions are out of scope for the #709 creation sweep; a tracker-agnostic close/state primitive is separate follow-up work. On a non-GitHub project, close the spike manually.)

gh issue close {spike-number} --repo {owner/repo} \
  --comment "Spike disposition: PROMOTE. Follow-up filed as #${ref} — {feature-title}. Spike branch is NOT being lifted into production; the new feature work re-implements based on the findings recorded above."

Return both URLs:

Spike closed: {owner/repo}#{spike-number}
Follow-up:    {owner/repo}#${ref} — {feature-title}
              ${url}

3b. DISCARD — one question, then write a memo

What did we learn? One paragraph — enough that a future engineer who
asks the same question (or revisits the same library / approach) finds
this memo and doesn't re-explore the same ground. Be concrete:
  - what was the hypothesis?
  - what did the experiment show?
  - why is the answer no? (or "we shouldn't do this", or "X first")
  - what would change the answer? (under what conditions might we revisit?)

Then derive a slug from the spike title (lowercase, kebab-case, max 40 chars, stopwords trimmed) and write the memo:

mkdir -p docs/spike-memos
cat > docs/spike-memos/{slug}.md <<'EOF'
# Spike memo: {title}

> **Disposition: DISCARD** — hypothesis rejected; not pursuing further.

- **Spike ticket**: {owner/repo}#{number}
- **Author**: {git config user.name}
- **Closed**: {ISO-8601 date}

## Hypothesis (from the spike ticket)

{hypothesis from the original ticket body}

## Findings

{the one-paragraph answer the operator wrote}

## Why we're not pursuing

{extracted from the operator's answer — the "answer is no" part}

## What would change the answer

{conditions under which we might revisit — extracted from the operator's
answer, or "—" if not specified}

## Artefacts

- Original spike ticket: {owner/repo}#{number}
- Spike branch: spike/<TICKET-ID>-<slug> (delete after merge of this memo)
EOF

The memo is committed in a separate PR (the spike's PR may or may not have merged — the memo PR is the disposition artefact, separate from any code).

After writing the memo, close the spike with a cross-ref:

gh issue close {spike-number} --repo {owner/repo} \
  --comment "Spike disposition: DISCARD. Memo at docs/spike-memos/{slug}.md (commit in follow-up PR). Spike branch can be deleted; nothing is being lifted into production."

Return:

Spike closed: {owner/repo}#{spike-number}
Memo path:    docs/spike-memos/{slug}.md

Next steps:
  1. Stage the memo:   git add docs/spike-memos/{slug}.md
  2. Commit:           git commit -m "docs: spike memo for #{spike-number}"
  3. Push + PR — the memo is the disposition artefact.
  4. Delete the spike branch once the memo PR merges.

Rules

1. Disposition is PROMOTE or DISCARD only. No third path. The whole point of the gate is to forbid "decide later".
2. PROMOTE files a fresh [Feature]. The spike branch is NOT lifted into production. Promotion creates a new ticket; the production work re-implements based on the findings.
3. DISCARD writes a memo. Spike-memo at docs/spike-memos/<slug>.md is the artefact — no memo, no DISCARD.
4. One question at a time. Same conversational rule as /spike and /feature.
5. No hard block on closing without /spike-close. The skill prompts; closure is ultimately the operator's call. The cost of forgetting is no record of what was learned, which is enough downside to motivate running the gate without needing a mechanical block.
6. Cross-references both ways. PROMOTE links the new feature back to the spike; DISCARD links the memo back to the spike. Future archaeology should always find the trail.

Edge cases

• Spike PR didn't merge. Fine — the memo / follow-up feature is the disposition artefact, not the spike code itself. PROMOTE: file the new feature, close the spike, abandon the branch. DISCARD: write the memo, close the spike, abandon the branch.
• Spike's hypothesis was partially confirmed. Treat the partial confirmation as PROMOTE — file the [Feature] for the part that worked; cover the part that didn't in the "What is NOT being carried over" section. Don't try to split the disposition.
• Multiple spikes feeding one feature. PROMOTE each spike individually with the same target [Feature] title; the feature ticket's body lists all promoting spikes in the "Spike findings" section.

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Part of ApexYard — multi-project SDLC framework for Claude Code · MIT.