A1. router.lua surface clean; classify_model is a natural sibling of
classify. No structural refactor.
A2. broker error message shapes confirmed: all transport errors carry
"transport: " prefix; "api: " for SSE-framed semantic errors;
"broker: " for config bugs. Fallback matcher must strip the prefix
before testing — list of eligible patterns tightened in §5.
A3. Q38 RESOLVED — summary doesn't go in ctx.turns (would create
system/system back-to-back, same gotcha as PHASE0 §6 user/user).
Instead lives on ctx.summary (string) and composes into the
system message between [background] and NORRIS suffix. No new
role:"system" turn; no alternation risk. §3 + §6 reflect.
Module-changes table updated to specify ctx.summary string field +
the to_messages composition order. Storage shape diagram in §6
rewritten.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Phase 5 formulate manifest. Three pillars per PHASE0 §11 row 5:
heuristic-based per-request model routing, single-hop cloud fallback
on local transport failure, and fast-model summarization at sliding-
window eviction time.
Resolutions baked in via §2:
- Routing trigger: per-request in repl.ask_ai, gated by
cfg.routing.auto (default off)
- Classification: pure-Lua heuristics (length, keywords, code-fence
detection, exception markers) — no LLM probe in v1
- Classes: code → deep, reasoning → cloud, default → keep active
- Fallback trigger: string-match on err for HTTP 5xx /
model_not_found / "Connection refused" / DNS / timeout
- Fallback: one retry against cfg.routing.fallback_model (default
"cloud" if configured); status line on every retry
- Summarize: enforce_budget invokes summarize_fn callback wired
by repl.lua to broker.chat with the fast model
- Summary turn: single rolling _summary at turns[1], appended to
on each eviction, re-summarized when it exceeds max_summary_chars
Open questions (Q37-Q42) in §10:
Q37 routing for :ask explicit ask
Q38 summary turn vs system-role alternation
Q39 fallback under Norris (proposal: single-request only)
Q40 summary re-summarize fidelity loss (lossy by design)
Q41 HTTP 408 pattern eligibility (default yes)
Q42 routing inside tool-call sub-loop (proposal: fix at entry)
5-commit roadmap in §11. No new module files; mostly repl.lua and
router.lua growth.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
marfrit