heatmap joins the family

[hamzafer]

What changed

A new mod, heatmap: /heatmap opens a GitHub-style grid of your Claude Code time, one square per day, in Claude orange.

• Cell: active minutes per local day (pauses over 5 minutes add nothing, a pause over midnight is split)
• Under the grid: current and best streak, active hours and sessions, peak weekday and hour, top 3 projects
• Keys: p switches between all projects and this repo, arrows move a day cursor (after a click, as in snake), q closes
• Own ledger: backfills from the session logs once, then keeps one line per day per project in ~/.claude/heatmap/days.jsonl, so the grid outlives the 30-day log cleanup. Older days are never rewritten
• Toast when a streak reaches 7, 30 or 100 days
• Reads logs with grep (logs can pass the 4 MiB read limit). A full backfill of 1.4 GB of logs takes about a second

Spec: docs/superpowers/specs/2026-10-15-heatmap-design.md. Screenshot from sample data with generic project names.

Checklist

• claude plugin validate mods/heatmap passes
• claude plugin test mods/heatmap passes (23 tests)
• Changed a mod: version bumped in its plugin.json and in .claude-plugin/marketplace.json
• New mod: entry in .claude-plugin/marketplace.json
• New mod: README table row and docs/mods.md notes
• Site page, index row, JSON-LD and sitemap entry

🤖 Generated with Claude Code

[hamzafer]

Review outcomes

Codex (gpt-5.6-luna, one pass): no actionable issues.

Sonnet review, fixed in 286c85a:

#	Finding	Outcome
1	Days lost when session.end never runs	Fixed: refresh from the ledger's last day (yesterday at the latest), reading logs touched since
2	Resumed sessions double-count	Confirmed on real logs (~8% of message times appear in two logs). Fixed: each message time counts once per project. Parallel sessions still both count, now documented
3	Empty ledger skips backfill; failed refresh loads forever	Fixed: an empty ledger backfills, and the pane shows the error
4	Silent grep truncation	Fixed: logged
5	DST edge on the 48h window	Fixed by 1 (the window is gone)
6	Milestone toast can come a session late	Kept: the spec toasts at session start. Late, never wrong
7	Cursor moves to another day on resize	Fixed: the cursor is anchored to a date
nits	-- before paths, cwd grep timeout	Fixed. Long hashed project folders: left as is (rare)

New tests cover 1, 2 and 3 (26 tests in all). A Sonnet agent is verifying the fixes.

[hamzafer]

Fix check (Sonnet): 3, 5, 6 and 7 verified. Three follow-ups it found are fixed in bea1a7d: a refresh no longer drops an old row whose logs are gone (a fresh row only replaces the same day and project), the earliest message is found with a loop instead of Math.min(...times) (argument limit on long logs), and a tie goes to the shorter log (the original a resume copied from). isStdoutTruncated is in the engine's process.run result type. 27 tests pass.