Both v3 mid-loop compaction and v2 background summarization were
dropping MediaRefs when summarizing old messages, making previously
shared images/documents permanently inaccessible to the agent.
Now collect up to 30 most recent MediaRefs from compacted messages
and attach them to the summary/first-kept message so they survive
the compaction cycle.
Compaction summaries were too generic ("provide a concise summary"),
causing loss of task progress, decisions, and identifier corruption
after summarization.
Port from OpenClaw TS (compaction.ts):
- Structured MUST PRESERVE sections: active tasks, progress, last
request, decisions, TODOs, commitments
- Identifier preservation: preserve UUIDs, hashes, URLs, file names
exactly as written (no shortening/reconstruction)
- Prioritize recent context over older history
- Shared prompt constant used by both mid-loop and background
compaction paths
- Update go.mod and Dockerfile to Go 1.26
- Apply `go fix ./...` stdlib modernizations across 170+ files
- Add `go fix` to post-implementation checklist in CLAUDE.md
- Fix go fix misapplied rewrite in loop_history.go
Goon