docs: document file naming conventions and clarify structure guidance

Added explicit file-naming rules to page-templates.md so agents know:
- Root entry-points: ALL-CAPS (AGENTS.md, README.md)
- Containers: <id>-<name>.md (e.g., 101-jellyfin.md)
- Infrastructure: lowercase-with-dashes (dns.md, auto-deploy.md)
- Plans/investigations: YYYY-MM-DD-slug.md
- Skills: lowercase-with-dashes/ folder containing SKILL.md

Updated AGENTS.md section 4 (Wiki conventions) to link to page-templates.md
and provided quick reference for file naming, page locations, and changelog format.

Updated README.md conventions section to mention file naming and link to
page-templates.md for the full rules.

All agents now have a clear reference chain:
  1. AGENTS.md (entry point) → points to conventions
  2. page-templates.md (structure) → has file naming + page templates
  3. writing-style.md (prose) → has voice, vocabulary, linking rules
  4. llm-wiki.md (organization) → has sources/wiki/index/log model

Verified: no broken links, all conventions documented, consistency check passes.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

AGENTS.md

@@ -75,19 +75,25 @@ Grep is fine for browsing or when MCP is unreachable.
 
 ## 4. Wiki conventions
 
-- Narrative pages live under `knowledge/wiki/{containers,hosts,vms,infrastructure}/`;
+See [page-templates.md](.agents/shared/page-templates.md) for file naming, page
+structure, and the tone standard. Quick reference:
+
+- **File naming:** Root entry-points are ALL-CAPS (`AGENTS.md`); containers use
+  `<id>-<name>.md`; infrastructure uses lowercase-with-dashes; plans and investigations
+  use `YYYY-MM-DD-slug.md`; skills are folders with `SKILL.md` inside.
+- **Where pages live:** Narrative under `knowledge/wiki/{containers,hosts,vms,infrastructure}/`;
   incident records under `knowledge/sources/investigations/`; runbook procedures under
   `.agents/skills/<name>/SKILL.md`; operator reference under `.agents/operations/`;
   design docs under `plans/`. Cross-link liberally; orphans are bugs.
-- Every page ends with a `## Changelog` section, entries in reverse-chrono
-  order:
+- **Changelog format:** Every page ends with a `## Changelog` section, entries in
+  reverse-chronological order:
 
       ### YYYY-MM-DD — short title
       one or two lines describing what changed and why.
 
-- Investigation files are dated and slugged: `YYYY-MM-DD-slug.md`.
-- Live state takes precedence over docs. If you observe a discrepancy, update
-  the docs *in the same session* (per the same-session update rule).
+- **Live state precedence.** If you observe a discrepancy between the docs and
+  running state, update the docs *in the same session* (per the same-session update
+  rule in [page-templates.md](.agents/shared/page-templates.md#same-session-update-rule)).
 
 ## 5. Acting on the homelab