skill提交

.agents/skills/triage/AGENT-BRIEF.md

@@ -1,6 +1,8 @@
 # Writing Agent Briefs
 
-An agent brief is a structured comment posted on a GitHub issue when it moves to `ready-for-agent`. It is the authoritative specification that an AFK agent will work from. The original issue body and discussion are context — the agent brief is the contract.
+An agent brief is a structured comment posted on a GitHub issue or PR when it moves to `ready-for-agent`. It is the authoritative specification that an AFK agent will work from. The original body and discussion are context — the agent brief is the contract.
+
+The brief states **what the agent should do**, which stretches to both surfaces: for an issue, that's building the change from nothing; for a PR, it's what's left to do *to the existing diff* — finish it, close gaps, address review points. Same principles either way; the PR example below shows the difference.
 
 ## Principles
 
@@ -143,6 +145,43 @@ checked for matches.
 - Bug reports (only enhancement rejections go to `.out-of-scope/`)
 ```
 
+### Good agent brief (PR)
+
+For a PR, "Current behavior" describes the state of the diff, and the brief asks the agent to finish or fix it rather than build from scratch.
+
+```markdown
+## Agent Brief
+
+**Category:** enhancement
+**Summary:** Finish the contributor's `--json` output flag for `triage list`
+
+**Current behavior:**
+The PR adds a `--json` flag that serializes the issue list to JSON. The happy
+path works and the diff matches the project's command structure. Two gaps
+remain: errors are still printed as human text (not JSON), and the new flag has
+no test coverage.
+
+**Desired behavior:**
+With `--json`, all output — including errors — is well-formed JSON on stdout,
+and the command's exit codes are unchanged. The existing human-readable output
+is untouched when the flag is absent.
+
+**Key interfaces:**
+- The command's error path should emit `{ "error": string }` under `--json`
+  instead of the plain-text error
+- Reuse the existing serializer the PR already added; don't introduce a second
+
+**Acceptance criteria:**
+- [ ] `triage list --json` emits valid JSON for both success and error cases
+- [ ] Exit codes match the non-JSON command
+- [ ] A test covers the `--json` success output and one error case
+- [ ] Default (non-JSON) output is byte-for-byte unchanged
+
+**Out of scope:**
+- Adding `--json` to any other command
+- Changing the JSON shape of the success payload the PR already defined
+```
+
 ### Bad agent brief
 
 ```markdown