Verified live immediately after deploying: the endpoint returned 200 with
correct-looking stats (total=56, agent_authored=2) but items=[] always,
regardless of limit/source. Root cause: pgx v5 can't scan a timestamptz
column directly into a Go string — Scan() errored on every single row, and
that error was silently swallowed by a bare `continue`, so every row was
dropped with no trace in the logs. Fixed by casting updated_at::text in the
SQL (matching how every other handler in this codebase already returns
timestamps) and logging scan failures instead of swallowing them, so this
class of bug can't hide silently again.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
First slice of the observability/learning UI (the "see the system come alive
and learn" ask). The Knowledge page was search-only — blank until you typed —
so the knowledge Nomos now writes via upsert_knowledge was invisible unless
you knew to search for it. Now the page LEADS with what the system knows and
is learning:
- internal/httpapi/knowledge.go: GET /api/v1/knowledge/recent — recency-ordered
knowledge + a stats header (total, agent-authored, learned-this-week,
by-kind). Custom route (not OpenAPI-generated), same auth as the rest.
- web Knowledge page rewrite: stat cards up top (Total / Written by Nomos /
Learned this week / runbooks-investigations), then a "Recently learned" feed
with agent-authored notes highlighted and badged "learned by Nomos", tags,
and relative timestamps. A toggle filters to Nomos-only. Search still works,
now as a mode you enter/clear rather than the whole page.
This turns "the system is getting smarter" from a claim into something you
watch fill up: every gotcha the agent records shows here within seconds.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
- knowledge.go: scan tags as []string from pgx (not JSON)
- seed.go: convert tags to PG array format, fix runbook applies_to_type
- convert-wiki.py: fix entity slug prefixes to match inventory.yaml
(host: not proxmox-host:, ws: not workstation:, service:homelab-mcp with hyphen)
- convert-wiki.py: read from archive/knowledge/ since wiki was archived
