> **Corrected after opening.** The first version of this PR claimed the
id cross-check reported `"default"` for *every* authored workflow and
stranded cards in triage recovery forever. That was wrong, and the
correction is below in full. The reachable defect is the branding hole;
removing the id check is correctness, not a live bug fix.
## The bug (reachable)
`resolveWorkflowIrById` has four ways to substitute the default coding
IR. Three brand the result via `markFellBack`. The fourth did not:
```ts
if (isBuiltinWorkflowId(workflowId)) {
const builtin = getBuiltinWorkflow(workflowId);
const ir = builtin?.ir ?? defaultCodingWorkflowIr(); // <- unmarked substitution
```
An id that *looks* built-in but is not registered — a workflow removed
between releases, a typo'd selection — lands there and silently gets the
default coding IR. `resolveWorkflowIrForTaskWithProvenance` then reports
**`source: "selection"`** for it, handing a caller the default board's
graph under the selected workflow's name. That is precisely the lying
signal the API exists to prevent.
Found by review on this PR (thanks — see the thread), not by me.
## The correction to my own claim
I also deleted an id cross-check that ran after the marker check and
reported `"default"` when the resolved IR's `id` differed from the
requested workflow id. I justified that by saying it misfired for every
authored workflow, because `createWorkflowDefinition` stores an IR
verbatim while minting `WF-NNN` separately:
```
store workflow id = WF-001 stored ir.id = custom:prov
PROVENANCE source = default resolved ir.id = custom:prov <- the CORRECT IR, called a guess
```
**That measurement is real but it came from this suite's own fixture.**
Neither `WorkflowIrV1` nor `WorkflowIrV2` declares an `id` field. An
editor-authored workflow carries none, so `resolvedId` is `undefined`
and the check passed it as `"selection"` — the misfire never reached
`triage.ts`'s post-U11 intake recovery, the one production consumer. My
"declined forever, not deferred" claim does not hold.
Removing the check is still right: it is **unreliable** (it interrogates
a property the IR types do not declare, and when one is present it is
the author's id, unrelated to the store-minted row id) and **redundant**
(all four substitutions are now branded, and the marker is checked
first). But it is a cleanup, not a fix — and saying otherwise is how a
narrow change gets backported as a critical one.
## Tests
| case | asserts |
|---|---|
| unregistered **built-in** id | **`source: "default"`** — the reachable
defect |
| missing definition | still `"default"` |
| no selection | still `"default"` |
| IR carrying its own id | `"selection"`, with the id mismatch asserted
explicitly so it can't pass for the wrong reason |
| the resolved IR is the task's own board | contains the renamed hold
column, not a default-board id |
**Mutation-verified:** removing only the branding fails the
unregistered-builtin case and nothing else — which shows it covers that
specific hole rather than overlapping the others. Restoring the id check
fails only the carries-its-own-id case, leaving both fallback cases
green, which shows the deletion did not widen trust.
## Blast radius
`triage.ts:1211` is the only production consumer of the provenance
result across core, engine, dashboard and CLI. Every other `.source ===`
hit is an unrelated field on an unrelated type; the two index hits are
re-exports.
## Verification
- new suite — **5/5**, mutation-verified in both directions
- `pnpm test:gate` — **exit 0**
- `pnpm lint` — clean
Changeset included (`patch`, category `fix`), rewritten to describe the
branding fix rather than the overstated one.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
---------
Co-authored-by: Claude Opus 5 (1M context) <noreply@anthropic.com>
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