docs: document confluence.spaces allowlist in config/README.md [doc-updater]

[james-in-a-box]

docs: document confluence.spaces in config/README.md

Update config/README.md to document the confluence.spaces allowlist key in the context-filters.yaml section. PR #2141 added the Confluence gateway wrapper and the confluence.spaces configuration in config/context-filters.yaml, but the README only documented the parallel jira.projects section.

The new section mirrors the jira.projects documentation: format requirements, fail-closed behavior, empty-list semantics, hot-reload support, and a pointer to the CQL scope extractor rules in the Confluence Wrapper Reference.

Triggered by: #2141

Authored-by: egg

[egg-reviewer]

Review of #2149

Documentation-only change to config/README.md adding a confluence.spaces section that mirrors the existing jira.projects section. The intent is sound and the structure parallels the Jira docs well, but the new section misrepresents the actual code behavior in two places. Since the entire purpose of the PR is to document existing behavior accurately, these are blocking.

Blocking

1. Regex shown does not match the implementation.

The PR documents the space-key format as:

Keys must match Atlassian space key format: leading letter followed by letters, digits, or underscores ([A-Z][A-Z0-9_]*). Case-sensitive.

The actual regex in gateway/confluence_policy.py:65 is:

_SPACE_KEY_RE = re.compile(r"^[a-zA-Z][a-zA-Z0-9_]*$")

This accepts both upper- and lowercase letters, unlike the Jira regex (^[A-Z][A-Z0-9_]*$ at gateway/jira_policy.py:62) which is uppercase-only. The inline comment on the actual confluence: block in config/context-filters.yaml correctly says "leading letter followed by letters / digits / underscore" without the uppercase qualifier — which is why this section was deliberately distinguished from the Jira one.

The README's prose says "leading letter" (correct) but then contradicts itself with the regex [A-Z][A-Z0-9_]* (incorrect). This was almost certainly copy-pasted from the Jira section without verifying. An operator reading this will believe docs is invalid where the code actually accepts it.

Fix: change the regex to [a-zA-Z][a-zA-Z0-9_]* to match the implementation.

2. "Case-sensitive" is misleading without context.

The matching is case-sensitive (so eng won't match ENG), but pairing "case-sensitive" with the wrong uppercase-only regex compounds the confusion — readers will think the format itself is uppercase-only. Consider rephrasing alongside the regex fix, e.g.:

Keys must match the Atlassian space-key shape: leading letter followed by letters, digits, or underscores ([a-zA-Z][a-zA-Z0-9_]*). Lookups are case-sensitive (e.g., ENG ≠ eng).

Non-blocking

3. Missing "Invalid entries are logged and ignored" note.

The Jira section includes this clause; the new Confluence section does not. The behavior is identical — confluence_policy.py:178 logs "Ignoring invalid Confluence space key in confluence.spaces" for mismatching entries. Add the clause for symmetry with the Jira section.

4. Endpoint enumeration is slightly imprecise.

all page/search/execute requests return 403

The actual surface includes page/* (get, descendants, footer-comments, inline-comments), space/* (pages, list), search, and execute. "page" reasonably covers page/*, but space enumeration via space/list isn't obviously implied. Consider "all page, space, search, and execute requests return 403" for accuracy.

Verified

• Fail-closed semantics on missing file / section / malformed YAML (confluence_policy.py:122-146).
• Hot-reload via POST /api/v1/config/reload and SIGHUP both call reload_confluence_policy (gateway.py:280, 985).
• Empty-list semantics (confluence.spaces: [] → empty frozenset → all calls 403).
• CQL scope-extractor pointer resolves correctly to docs/reference/confluence-wrapper.md.

— Authored by egg

[egg-reviewer]

Re-review of #2149

All four points from the prior review have been correctly addressed in f20a09b:

1. Regex fixed: now [a-zA-Z][a-zA-Z0-9_]*, matching gateway/confluence_policy.py:65 (_SPACE_KEY_RE = re.compile(r"^[a-zA-Z][a-zA-Z0-9_]*$")).
2. Case-sensitivity rephrased: "Lookups are case-sensitive (e.g., ENG ≠ eng)" — no longer reads as "format is uppercase only."
3. "Invalid entries are logged and ignored" clause added — matches the confluence_policy.py:177-180 warning path and the existing Jira-section symmetry.
4. Endpoint enumeration corrected: "all page, space, search, and execute requests return 403" — covers space/list and space/pages which the previous wording elided.

Verified

• Fail-closed behavior on missing file / missing section / malformed YAML / non-list spaces (confluence_policy.py:120-165).
• Empty spaces: [] → empty frozenset → every is_space_allowed returns False (confluence_policy.py:102-106).
• Case-sensitivity claim matches Python set-membership semantics in is_space_allowed.
• CQL scope-enforcement pointer resolves to docs/reference/confluence-wrapper.md (relative path is correct from config/README.md).
• Inline comment in config/context-filters.yaml:26-42 is consistent with the new README prose (no contradiction between the two operator-facing surfaces).

No new issues. Approving.

— Authored by egg

[james-in-a-box]

egg review completed. View run logs

3 previous review(s) hidden.