feat(buglog): one Markdown record per bug, checked against a record standard

The buglog was one 27K-line JSON file whose fields covered only symptom,
root cause and fix, as free text: 2% of entries named the code version a
bug was found on, 12% the build profile, 36% a way to reproduce, and 58% of
the file was OpenWolf hook auto-detections ("Missing guard clause",
"Function not marked async" on .md files).

- .claude/skills/buglog/bug-record.md: the record standard. Eight
  sections (Summary as the title, Description, Environment, Reproduction;
  Root cause, Fix, Verification, References once fixed), each with the
  content it must contain -- e.g. Environment needs the OS, the libc the
  failing binary loads (from its ELF interpreter: glibc 2.42 in the nix
  shell vs 2.40 on the host), toolchain, build profile and commit.
- .wolf/bugs/<id>.md: 500 records migrated from buglog.json; every field
  verified to round-trip. They carry legacy: true and an explicit "not
  recorded" where the old log had no such field; component derived from
  file paths, severity from keywords (else unknown), fix_commits from
  hashes in status_note/fix that git resolves (91 of 463 fixed).
- .wolf/buglog-archive.json: the 710 hook auto-detections, verbatim.
- .wolf/buglog.json is now an index generated from the records, keeping
  the fields OpenWolf's hooks and `openwolf bug search` read.
- scripts/buglog.py rewritten: new (template + Environment collected from
  the machine and --binary), check, status (refuses a status the record
  doesn't support; fixed needs Root cause, Fix, Verification and
  --commit hashes git resolves), note, recur, set, show, list, triage,
  env, index. 29 unittest cases in scripts/tests/test_buglog.py.
- scripts/git-hooks/pre-commit runs `check --staged`: incomplete staged
  records, a legacy record hand-changed to fixed without the fix-time
  sections, a new record claiming legacy: true, or a stale index refuse
  the commit.
- scripts/gitea-sync.py reads the records: issue body = the record's
  sections plus linked fix commits (origin remote, GITEA_COMMIT_REPO to
  override), and a body hash so an issue's text is refreshed when the
  record changes.
- bug-1866 rewritten to the full standard as the worked example.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

.wolf/bugs/bug-1869.md

@@ -0,0 +1,42 @@
+---
+id: "bug-1869"
+status: "fixed"
+status_updated: "2026-09-26"
+status_note: "5df33e69: xcecd_open_owned_file()/xcecd_owned_file_exists() (xcecd_tmpfile.h) for the worker log, xcecd_worker.log and restart flag; fchmod instead of chmod(path)."
+component: "worker"
+severity: "security"
+timestamp: "2026-09-26T07:55:23Z"
+last_seen: "2026-09-26T07:55:23Z"
+occurrences: 1
+files: ["src/worker/src/process_worker_manager.c", "src/worker/src/xcecd.c"]
+tags: ["security", "worker", "symlink", "tmp"]
+related: ["bug-1868"]
+fix_commits: ["5df33e69"]
+legacy: true
+gitea_issue: 289
+gitea_synced_status: "fixed"
+---
+
+# bug-1869: Other root-owned opens of fixed /tmp names in the worker daemon follow symlinks…
+
+## Description
+Other root-owned opens of fixed /tmp names in the worker daemon follow symlinks: process_worker_manager.c opens /tmp/xcecd_worker.log O_WRONLY|O_CREAT|O_APPEND (xcecd_worker's stdout/stderr appended through a planted symlink into any file), and xcecd_prepare_restart() (xcecd.c) opens /tmp/.xcecd.restarting O_CREAT|O_WRONLY (creates an empty root-owned file at a dangling symlink's target)
+
+## Environment
+_Not recorded (migrated from buglog.json)._
+
+## Reproduction
+_Not recorded (migrated from buglog.json)._
+
+## Root cause
+Same class as bug-1868: fixed, predictable names in world-writable /tmp opened by root without O_NOFOLLOW/O_EXCL; only the host's fs.protected_symlinks sysctl mitigates. Found while fixing bug-1868; left out of that fix's scope.
+
+## Fix
+_Not recorded (migrated from buglog.json)._
+
+## Verification
+_Not recorded (migrated from buglog.json)._
+
+## References
+- Related: bug-1868
+- Gitea: #289