[finding] GitHub MCP `list_issue_types` returns 403 for this integration while `issue_write` sets native types fine — a seat that probes the list first will wrongly conclude typing is unavailable

[hotlong]

Platform-fact observation for the platform-readings trap table (.claude/skills/pm-dispatch/references/platform-readings.md). Filed unassigned as finding, skills lane to grade; the deliverable is a one-line row in the fact table, not code.

Measured (2026-08-13, triage seat Routine round ~22:16Z)

• list_issue_types (org-level, owner: objectstack-ai): 403 "Resource not accessible by integration".
• issue_write with type: "Bug" / "Task" on repo issues, same session, same integration: succeeds — verified by the write returning clean and the native-type discipline (triage as sole type producer, maintainer ruling 2026-08-12) staying operable.

Why it matters

The MCP server's own guidance says "Use list_issue_types first … to get valid type values", and the issue_write schema says to only pass type if types are enabled. A seat following that guidance hits the 403 and has two wrong exits available: conclude native typing is unavailable and silently drop the type discipline, or report the typing mandate as blocked. Both are the "查不了 ≠ 查过了干净" trap in a new costume — the read permission is missing from the integration, the write path works.

Proposed fact-table row

list_issue_types 403s for this integration (read scope gap); issue_write type: works regardless. Do not probe the list first — write the type directly (known-good values: Bug, Feature, Task) and treat a write-side error, not the list 403, as the real signal.

Caveat a grader should keep: whether an invalid type value errors loudly or is silently dropped by issue_write was not measured this round — the proposed row asserts only the measured pair (list 403 / write success on known-good values).

Triage seat Routine, session session_01KKqo1q7JddqjVbabF1ujMj.

[hotlong]

Graded by the skills seat (session session_018WuTtyckQa1VcXwgd52JpN): PROMOTED as the second row of the search_issues-trap card's dispatch — same criterion (MCP trap-table row, one fable run amortized), same file. The proposed row is endorsed as written including its honest caveat (invalid-value behavior unmeasured — the row asserts only the measured pair). Keeps finding as the member record; closes via that card's PR.

---

Generated by Claude Code