Key Themes

• Broken fallback path: The PR removes objective-mapping.json computation instructions but adds a fallback to merged-prs-linked.json — a file that doesn't contain precomputed objective values. An agent following the fallback path has no instructions for computing objective_value, risking silent wrong results.
• Stale model definition: The Objective Value = definition block (line 78) still describes live computation from labels, contradicting the new precomputed approach.
• Ambiguous zero-value classification: The objective_value === 0 rule conflates null/absent/empty-array with a semantically different state, potentially misclassifying entries.
• Rule precedence not stated: Rules 2 and 5 in "Outcome association rules" can logically conflict for certain entries; the evaluation order should be explicit.

Positive Highlights

• ✅ Excellent root-cause fix: replacing live regex/LLM lookups with deterministic precomputed fields eliminates a major source of statistical drift
• ✅ attribution_source: "none" exclusion is explicitly documented — no ambiguity on the "exclude vs. fall back to PR labels" question
• ✅ The new fallback instruction (line 154) is a good safety net; it just needs the missing objective-computation guidance
• ✅ Clear separation between PR outcomes and safe-output issue outcomes throughout

[/diagnose] Fallback path is missing objective computation guidance — if *-with-objective.json files are absent, the agent has no instructions for deriving objective_value from the older merged-prs-linked.json files.

<details>
<summary>💡 Explanation and suggested fix</summary>

The PR removes the only instructions for computing Objective Value from objective-mapping.json (the pseudo-code mapping.ComputeObjectiveValue(root_labels) block is gone). When the fallback kicks in, an …

[/diagnose] The model definition on this line is now stale — it says Objective Value = ... objective-mapping configuration applied to traced root labels, but after this PR objective values are read from precomputed fields, not computed live.

<details>
<summary>💡 Suggested update</summary>

Update the model definition block to reflect the new precomputed approach:

Objective Value = precomputed field from *-with-objective.json (or safe-output-issue-evaluations.jsonl for issue outcomes…

</details>

<details><summary>.github/workflows/objective-impact-report.md:140</summary>

**[/diagnose]** The `objective_value === 0` disambiguation rule has an edge case: an empty array `root_issue_labels: []` is technically &quot;present&quot; in JSON but contains no labels, so the condition `has root_issue_labels or labels present` and `no root labels at all` can yield opposite results for the same logical state.

&lt;details&gt;
&lt;summary&gt;💡 Suggested clarification&lt;/summary&gt;

Be explicit about what &quot;present&quot; means:

If objective_value is 0:

• root_issue_labels is null, absent, or empty arra…

[/diagnose] Rule 2 (exclude attribution_source: "none") and Rule 5 (objective_value === 0 with labels → unmapped) have an implicit ordering that isn't stated — a PR with attribution_source: "none" could theoretically also have root_issue_labels present (e.g., pre-populated from the PR itself), triggering both rules.

<details>
<summary>💡 Suggested clarification</summary>

Add an explicit evaluation order note such as:
> "Evaluate exclusion rules (Rule 2) before classification rules…

[/grill-with-docs] Only two attribution_source values are documented ("closing_issue" and "none"), but if the Go implementation ever emits a third value (or if a future schema revision adds one), agents will silently mishandle those entries with no guidance.

<details>
<summary>💡 Suggested addition</summary>

Add an explicit catch-all rule:

- For any other attribution_source value: treat as "none" (exclude from analysis).

Or, if the enum is guaranteed exhaustive in the curre…

Data contract mismatch (4 existing issues, not repeated here)

The existing review (copilot-pull-request-reviewer) already captured four correctness issues: *-with-objective.json files are not produced by the current dataset generator; safe-output-issue-evaluations.jsonl does not currently emit objective_value/objective_labels/attribution_source; the attribution_source: "artifact_labels" case is silently unhandled; and root_issue_numbers/root_issue_labels are not present in the current PR datasets. Those remain unresolved and blocking.

New issues found in this pass

1. objective_value == 0 is an unsafe unmapped proxy (line 140) — if any label in the objective mapping legitimately resolves to 0, those outcomes are silently mislabeled. An explicit unmapped: true boolean in the precomputed schema would be safer.

2. Broken fallback path (line 154) — the *-linked.json fallback files have no objective_value/objective_labels fields, and this PR removed all instructions for live objective computation. If the fallback fires, the agent silently produces a report with zero objective attribution and no error.

3. zizmor: ignore annotation displaced in lock.yml (lock.yml line 1637) — the suppression comment was moved off the run: key line onto a preceding standalone line, which zizmor does not recognize as a suppression. This is likely to break the CI security scan.

objective_value == 0 is an unreliable proxy for "unmapped" — if any label in the objective mapping legitimately resolves to value 0, those outcomes will be silently mislabeled.

<details>
<summary>💡 Suggested fix</summary>

The rule "objective_value is 0 AND labels present → unmapped" implicitly assumes that no label in .github/objective-mapping.json maps to value 0. If a label category (e.g., wontfix, chore) is explicitly assigned value 0 in the mapping, those outcomes will be fal…

The fallback to *-linked.json is a dead end — those files lack the precomputed objective fields, and this spec no longer retains any instructions for computing them live.

<details>
<summary>💡 Why this silently breaks</summary>

When *-with-objective.json files are missing or empty, the spec says to fall back to merged-prs-linked.json / closed-unmerged-prs-linked.json. But:

1. Those files only contain linked_issue_numbers; they have no objective_value, objective_labels, `root_is…

The zizmor: ignore annotation was moved off the run: key line to a standalone preceding comment; this likely breaks the suppression and will cause CI to start failing.

<details>
<summary>💡 Details</summary>

Previously the suppression was inline:

run: | # zizmor: ignore[github-env] - GITHUB_SERVER_URL is set by GitHub Actions, not user input.

Now it is a standalone comment on the line above:

# zizmor: ignore[github-env] - GITHUB_SERVER_URL is set by GitHub Actions, no…

</details>

<details><summary>.github/workflows/objective-impact-report.md:64</summary>

`root_issue_labels` is listed as a field in `safe-output-issue-evaluations.jsonl`, but that field only exists for PR records — safe-output issues are resolved via `ResolveIssue()` with no root-issue tracing.

&lt;details&gt;
&lt;summary&gt;💡 Details&lt;/summary&gt;

Line 64 asserts that `safe-output-issue-evaluations.jsonl` contains `root_issue_labels`. But this field is the output of `ResolvePullRequest()`, which traces a PR to its linked closing issue and attaches that issue&#39;s labels. Safe-output issues are r…

</details>

<details><summary>.github/workflows/objective-impact-report.md:137</summary>

The exclusion rules only handle `attribution_source: &quot;closing_issue&quot;` and `&quot;none&quot;`, but the resolver also emits `&quot;ambiguous&quot;` for PRs with multiple closing issues — those are silently miscounted as &quot;no linked issue.&quot;

&lt;details&gt;
&lt;summary&gt;💡 Details&lt;/summary&gt;

`intent.Resolver.ResolvePullRequest` has a third outcome: when a PR has multiple `closingIssuesReferences`, the ambiguous path fires and returns an `IntentRecord` with `attribution_source: &quot;ambiguous&quot;`, `Status: &quot;ambiguous&quot;`, and no populat…

</details>

<details><summary>.github/workflows/objective-impact-report.md:149</summary>

The exclusion condition &quot;entry has no `root_issue_numbers`&quot; is ambiguous between an absent field and an empty array `[]`, leading to opposite outcomes for ambiguous-attribution PRs.

&lt;details&gt;
&lt;summary&gt;💡 Details&lt;/summary&gt;

The dataset-build script can serialize a PR with no resolved root issues as either:
- `&quot;root_issue_numbers&quot;: []` (empty array present), or
- the field entirely absent from the record

&quot;Has no `root_issue_numbers`&quot; is ambiguous across these two representations. If the agent t…

</details>