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Confirming a harness spawns the CLI and runs a JSON-RPC handshake, which costs seconds. The agent picker is about to probe readiness alongside the External harnesses panel, so the same harness can be asked about twice at once — two subprocesses for one answer. An in-flight map keyed by id lets the second concurrent caller join the first, cleared in a finally so a call made after it settles starts a fresh probe. De-duplication, not caching: an adapter installed between two looks must still be visible, which is exactly what the Install button does.
The agent page's harness picker needs the same local survey the External harnesses panel does, so the probe half moves into `useHarnessRows` and `statusOf` joins the other shared derivations in `lib/harnesses.ts`, which stays React-free for the unit lane. Only the probe half moved. Each caller keeps its own `listHarnesses` fetch, because the panel reads it under conditions the agent page does not: it has to tell a 404 from an empty list, and its generation guard exists because a superseded 404 once blanked a working panel. Both are now covered by tests that pass against the pre-refactor component too, which is what makes them a parity proof rather than a restatement of the new shape. `surveying` is derived from the input rather than set inside the effect, so Check again is never re-armed for the one frame between the fetch landing and the join.
The picker built each option from the manifest alone, so an operator could bind a teammate to a coding CLI with no way to know whether it was installed, signed in, or absent. The turn just failed later, somewhere else. Each option now carries this machine's own verdict, and the drafted harness carries the one action the app can take about it — installing the ACP adapter, which is the app's dependency rather than the operator's. Installing re-reads the model list, because the install evicts the cached confirmation and nothing in the model effect's dependencies changes. Three things it deliberately does not do. It never disables an option: a browser cannot see a local CLI, so unknown readiness means nobody looked, and binding to a harness that turns out to be missing fails the turn with a reason rather than being pre-empted by a guess. It probes only while the editor is open, so viewing a teammate does not spawn a subprocess per harness. And it leaves harnessOptionLabel alone, because that string also feeds the closed trigger, where there is nowhere to put a dot.
The agent picker now joins the same two half-answers the Settings page does, so the contract doc had a caller it did not name and one sentence that read as if the agent editor only ever asked for models. Also states the two rules the new surface is most likely to be 'fixed' into breaking: an unready option stays pickable, and readiness is never persisted.
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📝 WalkthroughWalkthroughThe change centralizes harness surveying in ChangesHarness readiness
Priority: ⬇️ Low Estimated code review effort: 4 (Complex) | ~45 minutes Change: Feature Sequence Diagram(s)sequenceDiagram
participant AgentEditor
participant useHarnessRows
participant DesktopTransport
participant ACPBridge
AgentEditor->>useHarnessRows: enable while editor is open
useHarnessRows->>DesktopTransport: request local harnesses
DesktopTransport->>ACPBridge: probe harnesses
ACPBridge-->>DesktopTransport: return readiness
DesktopTransport-->>useHarnessRows: return local rows
useHarnessRows->>DesktopTransport: confirm checking rows
DesktopTransport-->>useHarnessRows: return confirmations
useHarnessRows-->>AgentEditor: render readiness and install state
Suggested reviewers: Merge Risk: 🔵 Low · up to Switching companies can temporarily or indefinitely show harnesses belonging to the previous company. The issue is localized and straightforward to fix. 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
Full details: Docstring CoverageExplanation Docstring coverage is 40.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 25 functions across 8 files. (1 skipped: 1 unsupported.) A rabbit reads each line, Comment |
Tiny Sweeper review
Last completed reportTiny Sweeper reviewTiny Sweeper reviewed this change across 6 lane(s) and found 1 active actionable finding(s). Detailed lane evidence and any incomplete work are listed below. State: Incomplete Review snapshot
Completeness: Incomplete What changedThe review could not produce a supported behavioral summary; inspect the cited changed surface and lane details below. FeaturesNone identified with supported citations. TestsNo supported feature-to-test mapping was produced. Test execution is not inferred.
Findings
Pending checks: Console E2E Could not review: tinysweeper/tests Before merge
How this fits togetherflowchart LR
n0["AcpConfirmation<br/>changed"]:::changed
n1["desktopHarnessId<br/>changed<br/>1 finding"]:::blocking
n2["HarnessRow"]:::impacted
n3["withReadiness"]:::impacted
n4["joinHarnesses"]:::impacted
n5["note"]:::impacted
n6["ExternalHarnesses"]:::impacted
n7["confirmAcpHarness"]:::impacted
n1 -->|uses| n2
n3 -->|uses| n2
n4 -->|uses| n2
n5 -->|calls| n3
n5 -->|tests| n3
n5 -->|calls| n4
n5 -->|tests| n4
n6 -->|uses| n2
n7 -->|uses| n0
classDef changed fill:#0d4429,stroke:#238636,color:#e6edf3
classDef impacted fill:#161b22,stroke:#6e7681,color:#c9d1d9
classDef flagged fill:#5a1e02,stroke:#d93f0b,color:#ffffff
classDef blocking fill:#67060c,stroke:#f85149,color:#ffffff
Agent review detailscritique
security
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description
e2e
Evidence and run details
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- 🪄 Fix CodeRabbit comments on this PR
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Inline comments:
In `@frontend/src/components/external-harnesses.tsx`:
- Around line 72-87: Clear the existing declared harnesses when starting a new
company load in the component’s fetch effect, before or alongside
setFetching(true), so useHarnessRows cannot render rows from the previous
company while loading or after a current non-404 failure. Preserve the existing
generation and 404 handling behavior.
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📒 Files selected for processing (9)
docs/spec/runtime/external-harnesses-ui.mdfrontend/src/api/transport/desktop.tsfrontend/src/components/external-harnesses.tsxfrontend/src/lib/harnesses.tsfrontend/src/lib/use-harness-rows.tsfrontend/src/views/team/AgentDetailView.tsxfrontend/test/unit/acp-confirm-dedupe.test.tsfrontend/test/unit/agent-harness-readiness-picker.test.tsfrontend/test/unit/external-harnesses-panel.test.ts
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Requesting changes: 1 lane(s) blocking, worst finding is high.
Fix or reply to the findings below and push. The next review clears this automatically once they are gone — you should not need to dismiss anything by hand.
$0.0522 · 971,794 in / 29,185 out · 43,890 cached (5%) · ladder/vectors, gpt-5.6-luna, deepseek/deepseek-v4-flash · 994 embedded
critique: $0.0246 · 443,106 in / 16,782 out · 22,134 cached (5%) · gpt-5.6-luna, deepseek/deepseek-v4-flash
security: $0.0237 · 456,288 in / 9,825 out · 21,756 cached (5%) · gpt-5.6-luna
description: $0.0010 · 20,562 in / 87 out · 0 cached (0%) · deepseek/deepseek-v4-flash
e2e: $0.0016 · 32,313 in / 202 out · 0 cached (0%) · deepseek/deepseek-v4-flash
| * the same reason {@link harnessAction} does: the settings list and the agent | ||
| * picker must not be able to call the same machine state two different names. | ||
| */ | ||
| export function statusOf(row: HarnessRow): { label: string; dot: string } { |
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Return the status key expected by LedgerBoard
LedgerBoard uses statusOf(row) as a Map key and compares it with column.id. Returning a new object on every call means equivalent statuses never match by identity, so rows will not be placed into their status buckets and the drag/status comparison will always treat them as different. Return the stable status identifier expected by those callers, or update the callers to use a stable field such as label/an explicit key while keeping the display metadata separate.
[RULE] incompatible-return-type ·
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This doesn't hold — LedgerBoard's statusOf is a caller-supplied prop ((row: T) => string, LedgerBoard.tsx:160/184/310/491), and the only caller, LedgersView.tsx:1354, passes its own (entry) => entry.status closure over ledger entries. This file's statusOf(row: HarnessRow) is imported only by external-harnesses.tsx and AgentDetailView.tsx, both of which destructure .label/.dot. LedgerBoard never sees this function — two unrelated functions sharing a name, over different row types. Not changing statusOf; changing its return shape would break both of its real callers for no benefit.
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CodeRabbit review on tinyhumansai#2399: setFetching(true) did not clear declared when company changed, so useHarnessRows kept rendering the previous company's rows for the whole in-flight fetch, and indefinitely on a non-404 failure. Track which company declared answers for and clear it whenever a load starts for a different one.
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@senamakel — ready for review, with one thing you should know before you look at the checks.
Full reasoning is on the inline thread. I have left it red rather than change correct code to turn a bot green — say the word if you would rather I did it the other way. Both bots' Everything else is green: 11 pass, 2 pending. |
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Summary
The agent page's Harness & model picker built each option from the manifest alone, so an operator could bind a teammate to
claudewith no way to know whether Claude Code was installed, signed in, or absent. Nothing said otherwise until the turn failed later, somewhere else.Each option now carries this machine's own verdict — the same join the External harnesses settings page already renders, reached through a shared
useHarnessRowshook. The drafted harness additionally carries the one action this app can take about it: installing the ACP adapter, which is the app's own dependency rather than the operator's.First step of the #2394 rollout.
Three things it deliberately does not do:
readiness: undefinedmeans "we did not look", not "not installed". Greying an option there would be a guess presented as a verdict, and binding to a harness that turns out to be missing already fails the turn with the harness's own reason —lanes.rs's doctrine, and strictly better than pre-empting it.localStorage, no app state; per page load only, with in-flight de-duplication. A stored flag is the second source of truth that could disagree with the CLI actually being there.GET {scope}/harnessesalready returns, not from a second check besideAppState::can_run_local_acp().harnessOptionLabelis untouched: it also feeds the closed trigger throughSelectValue, which is a string with nowhere to put a dot, so the badge is sibling JSX inside eachSelectIteminstead.API Or Behavior Changes
No host API change. Console behavior:
Ready/Add-on needed/Not signed in/Needs Node.js/Won't start/Desktop only/Managed/Remote). No option is ever rendered disabled.installAcpHarnessevicts the cached confirmation and nothing in the model effect's dependencies changes, so without that the picker stayed on free text until the operator toggled the harness away and back.confirmAcpHarnessde-duplicates concurrent calls for the same id. Settings and the picker open together now cost one handshake instead of two. De-duplication, not caching: a call made after one settles starts a fresh probe, so an adapter installed in between is still visible.Tests
Frontend-only change; the Rust gates below are not applicable and were not run.
npm run typecheck·npm run typecheck:unit·npm run typecheck:e2e— all three green.npx vitest run— 5897 passed, 3 skipped, 0 failed (650 files).bash scripts/ci/assert-design-tokens.sh·bash scripts/ci/assert-setup-inference-imports.sh— both green.New tests, each verified to fail against the pre-change source before it passed:
test/unit/acp-confirm-dedupe.test.ts— two concurrent confirmations produce oneinvokeand share one answer object; a third after it settles invokes again.test/unit/agent-harness-readiness-picker.test.ts— anadapterMissingrow badges "Add-on needed" (never "Not installed") and offers Install; installing brings the model picker up;readiness: undefinedreads "Desktop only" with no Install; no option is ever rendered disabled; viewing a teammate invokes neitheroc_acp_harnessesnoroc_acp_confirm_harness.test/unit/external-harnesses-panel.test.ts— parity cover for the refactored settings panel, including the recorded bug where a superseded 404 blanked a working panel. These four pass against both the pre- and post-refactor component, which is what makes them a parity proof rather than a restatement of the new shape.Verified in the running console against a live host (company
trojans), on a machine with both CLIs installed and neither ACP adapter present:Managed/Managed/Desktop only/Desktop only; every optionaria-disabled: null,data-disabled: false,pointer-events: auto; switching harness reset the per-harness model field correctly; no console errors from this path.opus[1m]pin preserved as an unlisted value.The one console error observed is pre-existing and unrelated: a
DialogTriggerforwardRef warning fromviews/room/ChannelRail.tsx, a file this PR does not touch.Not covered: the real Tauri shell was not built, so the desktop path's proof is the jsdom suite plus the stubbed-bridge browser run above rather than a live subprocess handshake.
Documentation
docs/spec/runtime/external-harnesses-ui.mdupdated — it named only one surface for the join and had a sentence reading as if the agent editor only ever asked for models. Now records the second surface and the hook, why each caller keeps its own fetch, the editor-only probe trigger, and the two rules this surface is most likely to be "fixed" into breaking (an unready option stays pickable; readiness is never persisted).Related
Part of #2394.
Summary by CodeRabbit