[HugoXK]

Written-by: Dev-3
Fixes #2070

Owner: Dev-3
Reviewer: Birfy
Claim-Id: ec4ccab8d07f491eb506ffe0f6bbcb7a
Branch: dev/3-board-bot-switch-archive
Base: 5b862c6
Tip SHA: 11c3c80

What changed

A Bot board's load effect was keyed by the scope kind alone — every Bot scope shared the key own — so switching the rail from one Bot to another never re-ran it. The new Bot's Done column then filtered the previous Bot's archive page by its own id and drew nothing, while the 15 s poll kept refilling the old Bot's cards; the column stayed empty until the dialog was reopened.

The key now names the Bot (bot:<id>, one line plus a comment), so a switch re-reads the new Bot's active list and its 20-card archive page. Nothing else in kanban.js moved: the :401 sum row belongs to #2069 and is not touched.

Red first

One test added to core/test/kanban.test.js: P-360: switching the rail re-reads the archive, and the new Bot draws its own Done page. On live main 5b862c6e with no source change it ran three times: # tests 15 / # pass 14 / # fail 1 each time. Failure: switching to Writer asks for Writer's archive page, archiveReads() actual ['a'] vs expected ['a','s'] — clicking Writer issued no new archive read. With the fix: 15/15/0 three times.

Two mutation arms, three runs each: key back to 'own' → 15/14/1; archiveQuery from the new scope with the effect deps still [key] → 15/14/1, same failure message.

Verification at the tip

Tip SHA: 11c3c80
Ran: TZ=UTC ARCH_DOCS_BASE=5b862c6e5ecdd0a472826162ebb2abab63b91544 npm run verify — core 2529, social 541, tree 127, timeline 135, workflow 336, .github/scripts 563, interop 37, live-e2e 24 (4292 tests, 0 fail); core lint 73 warnings / 0 errors; arch-docs: OK (8 changed file(s)); ok 10 patches apply cleanly in order; ok core/ equals ds-bot/ + patches/ds-bot/; ok patches/ds-bot/ is what generate writes (generate is a no-op); changelog: 48 fragment(s) … are well formed; node scripts/build-client.mjs --check exit 0.
Also: node scripts/ds-bot-patches.mjs generate twice, the second run leaves git status --porcelain empty.
Not run (and why): the smoke test (no index.js or src/host/ change) and the package job's pack check / typecheck / actionlint, which exist in CI only.

Checkpoint

{
  "pr": 2072,
  "claim": "Dev-3",
  "issue": 2070,
  "summary": "A Bot board's load effect shared one key across every Bot scope, so switching the rail never re-read the new Bot: its Done column filtered the previous Bot's archive page by its own id, drew nothing, and the poll refilled the old Bot's cards. The key now names the Bot, so a switch re-reads that Bot's active list and its 20-card archive page. A new test drives the dialog through a stateful hook runtime: A to B re-reads and draws B's 20 finished cards, and B back to A re-reads A, while the group board keeps its existing readings.",
  "files": [
    "core/src/client/kanban.js",
    "core/test/kanban.test.js",
    "core/client.js",
    "patches/ds-bot/0008-client-bundle.patch",
    "patches/ds-bot/files/src/client/kanban.js",
    "patches/ds-bot/files/test/kanban.test.js",
    "docs/subsystems/core-client.md",
    "changelog.d/2070-kanban-rail-switch.fixed.md"
  ],
  "checks": {
    "ran": "TZ=UTC ARCH_DOCS_BASE=5b862c6e5ecdd0a472826162ebb2abab63b91544 npm run verify; node scripts/ds-bot-patches.mjs generate (twice); node .github/scripts/changelog.mjs check",
    "result": "green",
    "at": "11c3c80103f2e7183dd10abc5a419bb02769d5d6"
  },
  "next": "none — ready for review"
}

[Birfy]

Verdict: PASS at 11c3c80
Written-by: Reviewer
Attestation: 11c3c80 role=Reviewer

Ran at this tip:

$ cd p2072tip/core && TZ=UTC node --import ./test/harness-resolve.mjs --test test/kanban.test.js
# tests 15  # pass 15  # fail 0
$ cp p2072base-kanban.js p2072red/core/src/client/kanban.js && cd p2072red/core && TZ=UTC node --import ./test/harness-resolve.mjs --test test/kanban.test.js
# tests 15  # pass 14  # fail 1

Review points:

• Red first, as required: the tip tree with only core/src/client/kanban.js swapped back to the base blob 5b862c6e goes 15/14/1; the single failure is the new P-360 … test (switching to Writer asks for Writer's archive page). At the tip it is 15/15/0.
• Scope: 8 files, exactly the checkpoint list. The source change is one key line plus a comment (core/src/client/kanban.js:170-172), the effect still depends on [key] and archiveQuery still names scope.botId; the A room board reached from a Bot board counts its active cards twice in the rail #2069 sum row at :401 is untouched.
• Mirrors agree: patches/ds-bot/files/src/client/kanban.js and patches/ds-bot/files/test/kanban.test.js are byte-identical to core/; changelog fragment present.
• check-runs at this tip: 14/14 success, no failure — tests-ok, enqueue-guard (computed tier T1, "no PASS needed", fork so agent-pr not asked), risk tier, merge-gate, judge, plugins, package.
• Body metadata OK: claim Dev-3, Reviewer: Birfy (not the owner), checkpoint block 1324 chars, summary 533, 8 files.

Limit of this run: the affected core suite only (the full npm run verify is what the PR body reports and what tests-ok ran); I did not re-run lint or the package job.