marfrit
d4c20f09df
Sonnet-reviewed (per the reviews-use-sonnet feedback memory).
BLOCKERs (RESOLVED in-place):
R1. M.chat would silently return (text, nil) for ALL non-streaming
callers — 4 of 5 categories (summarize/delegate/memory_summarize/
probe) flow through broker.chat, NOT chat_stream. §4 now shows
the explicit M.chat update that captures kind=="usage" alongside
"text" and returns (text, usage).
R2. call_broker fallback retry would credit usage to the wrong model
name. Fix: broker emits payload.model = model_cfg.model (which IS
the fallback's name when called with fb_cfg — chat_stream's
upvar). Wrapper keys by payload.model, NOT outer model_name. §4
+ §13 commit 3 reflect.
R3. build_request has TWO internal callers inside broker.lua itself,
not just the public surface. Plan §13 commit 1 risk row now
spells this out explicitly so the implementer doesn't read "every
caller already passes opts" as "external-only".
CONCERNs (FOLDED):
R4. Single cost_warn_fired flag covers two thresholds — first-to-fire
suppresses the other. Split into ctx.cost_warn_state = { dollars
= false, tokens = false }; :cost reset clears both. §7 + §13.
R5. Warn-check centralization — single _record_usage helper in
repl.lua wraps ctx:add_usage AND does threshold check. safety.lua
routes via helpers.on_usage / opts.on_usage callbacks. context.lua
stays decoupled from renderer.
R6. Preserve nil-vs-0 cost distinction. Accumulator slot gains
`is_local = true` (sticky) when ANY recorded usage had cost==nil.
`:cost detail` annotation comes from is_local flag, not a
fragile cost==0 heuristic.
R7. :cost detail sort needs 3-level deterministic key:
(cost desc, model asc, category asc) — table.sort is unstable.
R8. call_broker fallback passes opts.include_usage unchanged.
Documented as known assumption (B1 confirms both backends
accept; future-broken fallback can pass include_usage=false).
R9. :resume does NOT restore historical usage_totals. Per-turn usage
IS in session JSONL for scripting; cross-session aggregation is
Q-C2 deferred. Documented in §8.
R10. $%.4f loses sub-cent precision (cloud cost 0.000028 -> $0.0000).
Widened to $%.6f in §6 + §7 warn message format.
NITs (APPLIED):
N1. §4 pseudocode comment notes `if doc.usage` branch is independent
of choice branch (handles both B2 emission shapes).
N2. §2 stale "B7" reference corrected to B3.
N3. §13 commit 3 row gains explicit dependency note on commit 1's R1.
N4. §13 commit 4 spells out llm_probe -> llm_second_opinion ->
M.is_destructive signature chain widening.
N5. §3 + §13 commit 6 — PHASE0 §11 amendment already in tree
(3bad07b); commit 6 must NOT re-apply.
PHASE7.md now 803 lines (was 528 after plan). +275/-57. Ready for
implementation phase pending user gate.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
804 lines
40 KiB
Markdown
804 lines
40 KiB
Markdown
# aish — Phase 7 Manifest
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**Project:** aish — AI-augmented conversational shell
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**Document:** Phase 7 Requirements, Architecture & Design Decisions
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**Status:** Plan + review fold-in (tree at `0f14dc1`)
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**Date:** 2026-05-16
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**Review findings (independent Sonnet agent, 2026-05-16) — 3 BLOCKERs
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resolved in-place, 6 CONCERNs folded, 5 NITs applied:**
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R1 (BLOCKER, RESOLVED). **`M.chat` would silently return `(text, nil)`
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for ALL non-streaming callers.** `M.chat`'s internal on_delta only
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captures `kind == "text"`. Without explicit handling of
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`kind == "usage"`, four out of five categories that go through
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`broker.chat` (summarize / delegate / memory_summarize / probe)
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would report zero usage even after a cloud round-trip. **Fix
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folded into §4 + §13 commit 1:** M.chat's on_delta also captures
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the usage payload and returns it as the second value.
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R2 (BLOCKER, RESOLVED). **`call_broker` fallback retry — usage
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payload's `model` field credits the WRONG model name.** The
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`wrapped` on_delta in call_broker is closed over the PRIMARY's
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name; if the wrapped function uses an outer-scope `model_name`
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variable to key the accumulator, the fallback's usage gets
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misattributed. **Resolution:** the broker emits `payload.model =
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model_cfg.model` (which IS the fallback's model when called with
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`fb_cfg` — chat_stream's local upvar). The wrapper keys by
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`payload.model`, NOT by the outer `model_name`. Documented in
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§4 emission code + §13 commit 3 (wrapped on_delta uses
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`payload.model` for accumulator keying).
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R3 (BLOCKER, RESOLVED — promoted to docs). **`build_request` has
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TWO internal callers inside broker.lua itself**, not just the
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public surface. Migration is contained but both internal sites
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must be updated in commit 1. Plan §13 commit 1 risk row updated
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to call this out explicitly so the implementer doesn't read
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"every caller already passes opts" as "only external callers
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need touching".
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R4 (CONCERN, FOLDED). **Single `cost_warn_fired` flag for two
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thresholds is broken.** When both warn_at_dollars AND
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warn_at_tokens are configured, the first-to-fire suppresses the
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other. **Fix:** `ctx.cost_warn_fired` becomes `ctx.cost_warn_state
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= { dollars = false, tokens = false }`. Each threshold has its
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own flag; `:cost reset` clears both. §7 pseudocode updated.
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R5 (CONCERN, FOLDED). **Warn-check centralization decided:** use a
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single `_record_usage(model, category, usage)` helper inside
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repl.lua that wraps `ctx:add_usage` AND does the threshold check
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AND calls renderer.status when crossed. `context.lua` stays
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decoupled from `renderer`. safety.lua call sites get
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`helpers.on_usage = _record_usage` in the helpers table; probe
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callsite gets `opts.on_usage = _record_usage`. Single chokepoint
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for the warn check. §3 + §7 + §13 commits 3-5 reflect.
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R6 (CONCERN, FOLDED). **`nil` vs `0` cost distinction must be
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preserved at the accumulator level.** Local-model `$0` (no cost
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field) vs cloud-call-that-happens-to-cost-zero need to be
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distinguishable for `:cost detail` annotation. **Fix:** accumulator
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slot gains `is_local = true` when ANY recorded usage for that
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slot had `cost == nil`. Cloud calls with `cost = 0` (rare) stay
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annotated as cloud. §5 pseudocode + §6 annotation logic updated.
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R7 (CONCERN, FOLDED). **`:cost detail` sort needs three-level key
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for determinism.** Lua's `table.sort` is unstable; equal-cost
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rows would have arbitrary order. **Fix:** sort key is
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`(cost desc, model asc, category asc)`. §6 updated.
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R8 (CONCERN, FOLDED). **`call_broker` fallback passes `opts.include_usage`
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unchanged.** Documented as a known assumption (B1 confirms both
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backends accept; if a future fallback host rejects, the call-site
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can pass `include_usage = false` explicitly). §10 risk row added.
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R9 (CONCERN, FOLDED). **`:resume` does NOT restore historical
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`usage_totals`.** Per-turn usage IS in the session JSONL but
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`:resume` reloads turns for conversation continuity only; the
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accumulator stays empty. Documented in §8 surface notes; users
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who want cross-session totals can script the jsonl or wait for
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the deferred Q-C2 follow-up.
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R10 (CONCERN, FOLDED). **`$%.4f` loses sub-cent precision.** A
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`0.000028` cloud cost displays as `$0.0000` — indistinguishable
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from `$0` local. **Fix:** format strings widened to `$%.6f` in
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§6 (and the warn message in §7). 6 decimal places accommodates
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the smallest observed real cost.
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R-N1..N5 (NITs, APPLIED):
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N1. §4 extraction pseudocode gains a comment noting the
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`if doc.usage` branch is INDEPENDENT of the choice branch and
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must be checked regardless of choice nil-ness (handles both
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B2 emission shapes).
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N2. §2 "Cost extraction" row referenced stale "B7"; corrected to B3.
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N3. §13 commit 3 row gains an explicit dependency note: commit 3's
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"capture the new second return value" requires commit 1's M.chat
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fix from R1 to ship first.
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N4. §3 safety.lua row + §13 commit 4 row spell out the signature
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chain: `llm_probe` → `llm_second_opinion` → `M.is_destructive`
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all widen to thread `opts.on_usage` through.
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N5. §3 PHASE0.md row + §13 commit 6 row — the PHASE0 §11 amendment
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is ALREADY in tree (committed at `3bad07b` with the formulate
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doc). Commit 6 should NOT re-apply; only adds config.lua block
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+ bumps PHASE7 status header.
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**Analyze findings (2026-05-16):**
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A1. **broker.chat_stream surface is clean for the extension.** The
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existing `on_event(data)` closure inside `M.chat_stream` already
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parses `doc.error` / `doc.choices` / `delta` / tool_calls — adding
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`if doc.usage then final_usage = ... end` is one block. Emission
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happens via a closure-local `final_usage` that the post-loop code
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in `chat_stream` reads and calls `on_delta("usage", final_usage)`
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on. `build_request` needs minor extension OR (cleaner) `chat_stream`
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inserts `stream_options.include_usage = true` into the body table
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AFTER `json.encode` — but we currently encode in `build_request`.
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Cleanest: extend `build_request(model_cfg, messages, stream, opts)`
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so it can read `opts.include_usage`. Phase 7 simplifies the
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signature in passing.
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A2. **7 caller sites** identified for `opts.category` threading:
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| Site | Category |
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|---|---|
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| `safety.lua:191` (LLM probe) | `"probe"` |
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| `safety.lua:354` (norris main) | `"norris"` |
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| `repl.lua:326` (summarize-on-evict) | `"summarize"` |
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| `repl.lua:685` (call_broker wrapper, used by ask_ai) | `"main"` |
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| `repl.lua:1104` (DELEGATE: handler) | `"delegate"` |
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| `repl.lua:1587` (:memory summarize) | `"memory_summarize"` |
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| `repl.lua:2156` (:delegate meta) | `"delegate"` |
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All callers pass `opts` already; adding a `category` field is
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additive and backward-compatible (default to `"main"` when absent).
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A3. **`build_request` signature simplification.** Today it takes
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`(model_cfg, messages, stream, tools, max_tokens)` — five positional
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args. With Phase 7 needing `include_usage` AND `stream_options`,
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positional growth gets unwieldy. **Resolution:** widen to
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`(model_cfg, messages, stream, opts)` where opts carries
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`{tools, max_tokens, include_usage, stream_options}`. Callers in
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`M.chat_stream` and `M.chat` pass their existing opts table through.
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This is a refactor but contained inside broker.lua.
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A4. **Q-C3 RESOLVED: free-form categories.** The closed-set vs free-form
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debate resolved in favor of free-form per the helpers/skills
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convention already in place (Phase 6 :tree / :diff metas don't
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validate sub-args either). `:cost detail` will show whatever
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categories appear — small + documented closed set in practice
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(7 entries from A2), no surprise.
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A5. **Q-C5 RESOLVED: warn fires on the call that crossed.** The crossed
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call's usage IS in the accumulator at the moment we check (we
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check AFTER `add_usage`). Firing on the NEXT call would mean a
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delay of one full broker round-trip before the user sees the
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warn — defeats the purpose. Just emit-on-cross.
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A6. **Q-C6 RESOLVED: `:reset` does NOT clear `cost_warn_fired`.**
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Parity with `usage_totals` itself (per the §2 decision row); the
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user reset their conversation, not their cost meter. The flag
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AND the totals are reset only by the explicit `:cost reset` verb.
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A7. **Norris call-graph rewires (existing safety.lua:354 path):** with
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issue #52 wired (commit `955bd82`), the Norris broker call now
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passes `helpers.scrub_msgs` / `helpers.streaming_rehydrator`. The
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on_delta wrapping pattern means I need to be careful that the new
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`("usage", payload)` kind also flows through any wrapper. Since
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secrets streaming_rehydrator only matches on `kind == "text"`, the
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"usage" kind passes through unchanged. No new entanglement.
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A8. **`ctx.usage_totals` survives `:reset` per R8** — same invariant
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as `memory_items` (Phase 4) and `project` (Phase 6). Documented in
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§5 of the manifest; reinforces the "ambient context survives
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conversation reset" rule.
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A9. **Session JSONL serialization** — assistant turn dict gets an
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optional `usage` field. `history.lua` log_turn currently calls
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`json.encode(turn)` opaquely; the dkjson serializer handles nested
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tables. No code change needed; the new field flows through
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automatically when the assistant turn carries one.
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A10. **Q-C1 PARTIAL: local providers may not emit `usage`.** The
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formulate-time assumption was "treat absence as zero-cost / unknown".
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A real probe against `qwen-coder-7b-snappy-8k` is a baseline
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action — see B-probes below. The implementation will be defensive:
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if `doc.usage` never appears in the stream, no "usage" event is
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emitted, and the accumulator is unchanged for that turn. `:cost`
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output naturally reflects "0 calls counted for local model" if
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that's the case.
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A11. **Q-C4 deferred to baseline**: actual `stream_options` forwarding
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by the hossenfelder proxy must be probed against a live broker.
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If the proxy strips the option, we get no `usage` events even
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for cloud calls. Baseline action.
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PHASE0 is the locked substrate; PHASE1-6 are layered on top. This manifest
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specifies what Phase 7 adds — **cost / usage observability**: the ability
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to know, mid-session, how many tokens you've spent and how much money the
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paid-cloud calls have cost.
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PHASE0 §11 originally listed phases only through 6; this commit amends
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§11 to add Phase 7.
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---
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## 1. Scope of Phase 7
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Four pillars:
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1. **Usage capture in broker** — `broker.chat_stream` extracts the
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provider's `usage` block (and `cost` where present) from the response
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stream. Surfaces it to the caller via a new `on_delta("usage", ...)`
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kind. The existing `broker.chat` buffering wrapper exposes it as a
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second return value `(text, usage)`. Backward-compatible: callers
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that don't handle the new kind / second value simply ignore it.
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2. **Per-session accumulator on `ctx`** — running totals per-model AND
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per-call-category (main / delegate / summarize / probe) accumulate on
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`ctx.usage_totals`. No persistence across sessions in v1 (Q-C2
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defers cross-session); the session-log JSONL files DO carry per-turn
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usage so historical analysis is possible after the fact.
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3. **`:cost` meta** — a `:cost` reporter that shows the current session
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totals, with optional `:cost detail` for the per-model + per-category
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breakdown. Zero broker calls (purely local read of `ctx.usage_totals`).
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4. **Optional warning thresholds** — `cfg.cost.warn_at_dollars` and
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`cfg.cost.warn_at_tokens` emit a status the first time the running
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total crosses the configured threshold. Default off (no warnings
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without config). Useful when cloud presets are configured and you
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want a "you've spent $1 this session" nudge before runaway cost.
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**Phase 7 is done when:**
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- `broker.chat_stream` exposes usage via the new `on_delta("usage", ...)`
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callback kind; `broker.chat` returns `(text, usage)`. Backward compat
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preserved (no existing caller breaks).
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- After a session with mixed local + cloud calls, `:cost` prints a
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total like:
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```
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[aish] session usage: 24 turns, prompt=12,450 / completion=3,210 tokens
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cost=$0.0234 (cloud only; local: 0)
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```
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- `:cost detail` breaks down by model + category:
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```
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fast main: 14 turns, 8200/2100 tokens
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cloud main: 8 turns, 3850/980 tokens, $0.0180
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cloud delegate: 1 turn, 250/80 tokens, $0.0012
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cloud probe: 1 turn, 150/30 tokens, $0.0042
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```
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- Session JSONL gains a `usage` field on assistant turns (when the
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broker returned one).
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- With `cfg.cost.warn_at_dollars = 0.50` set, crossing $0.50 cumulative
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emits exactly one status line.
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- Existing configs without `cfg.cost` behave exactly like Phase 6
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(Phase 6 regression coverage).
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---
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## 2. Technology Decisions (delta from Phase 6)
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| Decision | Choice | Rationale |
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|---|---|---|
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| Where to extract usage | In `broker.chat_stream` event loop, looking at each SSE event's `usage` field on the final chunk | The OpenAI streaming spec puts `usage` on the FINAL chunk when `stream_options: { include_usage: true }` is in the request body. The Anthropic-via-Bedrock path through OpenRouter respects this; need to verify (baseline). |
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| New on_delta kind | `on_delta("usage", { prompt_tokens, completion_tokens, total_tokens, cost?, model?, native_finish_reason? })` | Mirrors the existing `("text", chunk)` / `("tool_call", call)` shape. Callers ignore unknown kinds; backward-compatible. |
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| Where to enable usage on the wire | `opts.include_usage = true` (default `true`) sets `stream_options.include_usage = true` in the outbound request body | Off-switch for hosts that reject `stream_options`. Defaults on; baseline probe confirms current broker tolerates it. (A3: `build_request` signature widens to take an `opts` table; positional growth was getting unwieldy.) |
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| Accumulator location | `ctx.usage_totals[model_name][category]` table | ctx is per-conversation; matches the `:reset`-survives-or-not rules already in place. |
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| Categories | `"main"` (ask_ai), `"delegate"`, `"summarize"`, `"memory_summarize"`, `"probe"`, `"norris"` | One-tag-per-call-site. Tagged at the caller site (caller passes `opts.category` to `broker.chat_stream`). |
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| Cost extraction | `usage.cost` (OpenRouter convention; dollars as a number). For Anthropic/Bedrock the cost arrives in dollars on `usage.cost`. For pure local llama.cpp: no `cost` field — record as nil (R6 — preserves the local-vs-cloud-zero distinction in the accumulator). | Single field name across observed providers per baseline B3. |
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| Cost precision | Store as `number` (Lua double = 53-bit mantissa, ~15 decimal digits — plenty for sub-cent precision) | No floating-point cumulative-error concerns at this scale. |
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| Warning trigger | First crossing of either threshold emits a single status: `[aish] session cost $X.XXXX has crossed warn_at_dollars=$Y.YYYY`. Crossed-flag stored on ctx; reset only on session end / `:cost reset`. | One-shot to avoid spamming. |
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| `:reset` interaction | `:reset` does NOT clear `ctx.usage_totals` (parity with `memory_items`/`project`) — the user reset their conversation, not their cost tracking. `:cost reset` is the explicit reset verb. | Matches R8 invariant from Phase 6. |
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| Session-log persistence | Assistant turn entries gain an optional `usage` field when broker returned one. `history.lua` log_turn writes it through verbatim. | Per-turn granularity preserved for after-the-fact analysis. No new file. |
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---
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## 3. Module Changes
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| File | State after Phase 6 | Phase 7 changes |
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|---|---|---|
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| `broker.lua` | `chat_stream(cfg, msgs, on_delta, opts)` with text + tool_call kinds; `chat` returns text | Extract usage from final SSE chunk; emit `on_delta("usage", payload)`; `chat` returns `(text, usage)`. New `opts.include_usage` (default true); new `opts.category` (passed through as a tag in the usage payload). |
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| `context.lua` | system prompt + turns + memory + project + summary | Add `self.usage_totals` (table) + `self.cost_warn_fired` (bool). New helpers: `Context:add_usage(model, category, usage)`, `Context:total_cost()`, `Context:total_tokens()`. `Context:reset` does NOT clear `usage_totals` (parity with memory_items / project per R8). |
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| `repl.lua` | ask_ai + delegate + summarize callbacks + Norris helpers | Wire `opts.category` at each broker call site (main / delegate / summarize / memory_summarize). Wire `on_delta("usage", ...)` -> `ctx:add_usage(...)`. New `:cost` and `:cost detail` / `:cost reset` metas. Cost-warn check after each `add_usage` call. |
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| `safety.lua` | norris_step + is_destructive | Pass `opts.category = "norris"` (for the main chat_stream call) and `"probe"` (for the is_destructive LLM probe). Surfaces probe-cost in the breakdown — useful since `safety.llm_model = "cloud"` is the recommended setting. |
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| `history.lua` | session.log_turn appends JSONL entries | log_turn already takes turn opaquely; assistant turns will carry `usage` if present and it'll serialize via dkjson. No code change unless filter desired. |
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| `config.lua` | example blocks for mcp/safety/memory/routing/secrets/hooks/project | Add commented-out `cost = { warn_at_dollars, warn_at_tokens }` block. |
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| `docs/PHASE0.md` | §11 lists phases 0-6 | Amendment landed at `3bad07b` (formulate commit). N5: commit 6 does NOT re-apply. |
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No new module files.
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---
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## 4. Pillar 1 — Usage capture in broker
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### SSE shape (provider-by-provider — confirm in baseline)
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For OpenAI-compatible streams with `stream_options: { include_usage: true }`:
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```json
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data: {"id":"...","choices":[{"index":0,"delta":{"content":"Hi"}, ...}]}
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data: {"id":"...","choices":[{"index":0,"delta":{}, "finish_reason":"stop"}]}
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data: {"id":"...","choices":[],"usage":{"prompt_tokens":15,"completion_tokens":3,"total_tokens":18,"cost":0.00004,"cost_details":{...}}}
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data: [DONE]
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```
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The final usage event arrives AFTER `finish_reason` but BEFORE `[DONE]`.
|
||
`choices` is empty `[]` on the usage event.
|
||
|
||
For non-streaming `chat`: usage is in the response body at the top level.
|
||
broker.chat is a wrapper around chat_stream, so it inherits the on_delta
|
||
path.
|
||
|
||
For local llama.cpp via hossenfelder: usage may or may not be present
|
||
depending on the proxy's version. Treat absence as zero-cost / unknown.
|
||
|
||
### Extraction algorithm
|
||
|
||
```lua
|
||
local final_usage = nil
|
||
|
||
local function on_event(data)
|
||
...
|
||
-- N1: this branch is INDEPENDENT of the choice branch below;
|
||
-- check unconditionally. Per B2, local emits usage on a
|
||
-- choices=[] chunk (choice nil); cloud emits on a non-empty
|
||
-- choices chunk (with finish_reason). Both shapes funnel here.
|
||
if doc.usage then
|
||
-- R2: payload.model is ALWAYS the caller-stable model_cfg.model
|
||
-- (chat_stream's local upvar). When called via call_broker's
|
||
-- fallback retry, this naturally reflects the fallback's
|
||
-- model name — wrapper callers can key by payload.model
|
||
-- without tracking primary-vs-fallback themselves.
|
||
final_usage = {
|
||
prompt_tokens = doc.usage.prompt_tokens or 0,
|
||
completion_tokens = doc.usage.completion_tokens or 0,
|
||
total_tokens = doc.usage.total_tokens or 0,
|
||
-- R6: keep nil-vs-0 distinction at this layer; the
|
||
-- accumulator decides how to tag local-vs-cloud-zero.
|
||
cost = doc.usage.cost, -- nil for local
|
||
model = model_cfg.model, -- caller-stable per B4
|
||
category = opts.category or "main",
|
||
}
|
||
-- Don't emit yet — the [DONE] event marks stream end; emit
|
||
-- once we exit the curl.post_sse loop so the caller sees
|
||
-- usage as the LAST event in the stream order.
|
||
end
|
||
-- ... existing text + tool_call handling (unchanged) ...
|
||
end
|
||
|
||
-- After curl.post_sse returns (stream complete). R3-related:
|
||
-- only emit on successful streams; transport / api errors skip
|
||
-- the usage event (caller sees the error path and accumulator
|
||
-- stays unchanged).
|
||
if api_err then return nil, "api: " .. api_err end
|
||
if not ok then return nil, "transport: " .. tostring(err) end
|
||
if final_usage then on_delta("usage", final_usage) end
|
||
return true
|
||
```
|
||
|
||
### `M.chat` capture (R1 — BLOCKER fix)
|
||
|
||
`M.chat` is the non-streaming buffering wrapper. Its existing on_delta
|
||
only captured text. Under Phase 7 it MUST also capture the usage
|
||
payload — otherwise EVERY non-streaming caller (summarize, delegate,
|
||
memory_summarize, probe — 4 of 5 categories) silently reports zero.
|
||
|
||
```lua
|
||
function M.chat(model_cfg, messages, opts)
|
||
local parts = {}
|
||
local captured_usage -- R1: required so M.chat returns (text, usage)
|
||
local ok, err = M.chat_stream(model_cfg, messages,
|
||
function(kind, payload)
|
||
if kind == "text" then parts[#parts + 1] = payload
|
||
elseif kind == "usage" then captured_usage = payload
|
||
end
|
||
end, opts)
|
||
if not ok then return nil, err end
|
||
return table.concat(parts), captured_usage
|
||
end
|
||
```
|
||
|
||
Existing callers that do `local r = broker.chat(...)` automatically
|
||
drop the second value (Lua semantics). Callers that want usage do
|
||
`local r, u = broker.chat(...)`.
|
||
|
||
### Outbound include_usage
|
||
|
||
```lua
|
||
local body_table = { model = ..., messages = ..., stream = true }
|
||
if opts.include_usage ~= false then
|
||
body_table.stream_options = { include_usage = true }
|
||
end
|
||
```
|
||
|
||
Risk: some providers reject unrecognized fields. Baseline check; if any
|
||
host throws on `stream_options`, the per-model opt-out is one line.
|
||
|
||
### Category tagging
|
||
|
||
`opts.category` is a string set by the caller. broker echoes it into the
|
||
emitted usage payload so the accumulator knows what to credit. Default
|
||
category if absent: `"main"`.
|
||
|
||
---
|
||
|
||
## 5. Pillar 2 — Accumulator on ctx
|
||
|
||
### Shape
|
||
|
||
```lua
|
||
ctx.usage_totals = {
|
||
-- [model_name] = { [category] = { prompt = N, completion = N,
|
||
-- calls = N, cost = N } }
|
||
fast = {
|
||
main = { prompt = 1234, completion = 567, calls = 14, cost = 0 },
|
||
},
|
||
cloud = {
|
||
main = { prompt = 3850, completion = 980, calls = 8, cost = 0.0180 },
|
||
delegate = { prompt = 250, completion = 80, calls = 1, cost = 0.0012 },
|
||
probe = { prompt = 150, completion = 30, calls = 1, cost = 0.0042 },
|
||
},
|
||
}
|
||
ctx.cost_warn_fired = false
|
||
```
|
||
|
||
### add_usage
|
||
|
||
```lua
|
||
function Context:add_usage(model, category, u)
|
||
model = model or "?"
|
||
category = category or "main"
|
||
self.usage_totals = self.usage_totals or {}
|
||
local m = self.usage_totals[model] or {}
|
||
local c = m[category] or {
|
||
prompt = 0, completion = 0, calls = 0, cost = 0,
|
||
is_local = false, -- R6: cloud unless any usage came w/o cost
|
||
}
|
||
c.prompt = c.prompt + (u.prompt_tokens or 0)
|
||
c.completion = c.completion + (u.completion_tokens or 0)
|
||
c.calls = c.calls + 1
|
||
-- R6: preserve nil-vs-0 distinction. A `nil` cost means the
|
||
-- provider doesn't emit cost (i.e., local llama.cpp). Sticky:
|
||
-- once a slot has seen any nil-cost call, it's flagged is_local.
|
||
if u.cost == nil then
|
||
c.is_local = true
|
||
else
|
||
c.cost = c.cost + u.cost
|
||
end
|
||
m[category] = c
|
||
self.usage_totals[model] = m
|
||
end
|
||
|
||
function Context:total_cost()
|
||
local total = 0
|
||
for _, m in pairs(self.usage_totals or {}) do
|
||
for _, c in pairs(m) do total = total + c.cost end
|
||
end
|
||
return total
|
||
end
|
||
|
||
function Context:total_tokens()
|
||
local p, comp = 0, 0
|
||
for _, m in pairs(self.usage_totals or {}) do
|
||
for _, c in pairs(m) do
|
||
p = p + c.prompt
|
||
comp = comp + c.completion
|
||
end
|
||
end
|
||
return p, comp
|
||
end
|
||
```
|
||
|
||
### Reset semantics
|
||
|
||
`Context:reset()` deliberately does NOT clear `usage_totals` —
|
||
matches R8 invariant from Phase 6 (`:reset` clears `turns`,
|
||
`pending_exec_output`, `summary`; preserves `memory_items`, `project`,
|
||
and now `usage_totals`). The user reset their conversation, not their
|
||
cost meter. `:cost reset` is the explicit reset verb for the meter.
|
||
|
||
---
|
||
|
||
## 6. Pillar 3 — `:cost` meta
|
||
|
||
```
|
||
:cost summary line
|
||
:cost detail per-model + per-category breakdown
|
||
:cost reset zero out ctx.usage_totals + cost_warn_fired
|
||
```
|
||
|
||
Summary format (R10 — 6-decimal precision for sub-cent costs):
|
||
|
||
```
|
||
[aish] session usage: 24 calls, prompt=12,450 / completion=3,210 tokens
|
||
cost=$0.023400 (cloud only; local: 0)
|
||
```
|
||
|
||
Detail format (R7 — sort key is `(cost desc, model asc, category asc)`
|
||
for deterministic ordering on equal-cost rows; R6 — annotation comes
|
||
from the slot's `is_local` flag, NOT a `cost == 0` heuristic):
|
||
|
||
```
|
||
[aish] session usage detail:
|
||
cloud main 8 calls, 3,850 / 980 tokens, $0.018000
|
||
cloud delegate 1 call, 250 / 80 tokens, $0.001200
|
||
cloud probe 1 call, 150 / 30 tokens, $0.004200
|
||
fast main 14 calls, 8,200 / 2,100 tokens, $0 (local)
|
||
```
|
||
|
||
Implementation: pure Lua iteration over `ctx.usage_totals`; no broker
|
||
calls. Sort flattens into a list, sorts via `table.sort` with explicit
|
||
3-level comparator: `cost desc, model asc, category asc`.
|
||
|
||
---
|
||
|
||
## 7. Pillar 4 — Warning thresholds
|
||
|
||
Config:
|
||
|
||
```lua
|
||
cost = {
|
||
warn_at_dollars = 0.50, -- emit once when cumulative cost crosses
|
||
warn_at_tokens = 100000, -- emit once when cumulative tokens crosses
|
||
}
|
||
```
|
||
|
||
R5 centralizes the check inside a single `_record_usage(model, cat, u)`
|
||
helper in repl.lua. This is the ONLY place that calls
|
||
`ctx:add_usage`; safety.lua call sites route through it via the
|
||
`helpers.on_usage` / `opts.on_usage` callback. Keeps `context.lua`
|
||
decoupled from `renderer` (no module-coupling violation).
|
||
|
||
R4: two independent flags (one per threshold) — first-to-fire must
|
||
NOT suppress the other.
|
||
|
||
```lua
|
||
-- repl.lua (sketch):
|
||
local function _record_usage(model, category, u)
|
||
ctx:add_usage(model, category, u)
|
||
if not (config.cost) then return end
|
||
ctx.cost_warn_state = ctx.cost_warn_state or { dollars = false, tokens = false }
|
||
local cw = ctx.cost_warn_state
|
||
if config.cost.warn_at_dollars and not cw.dollars then
|
||
local cost = ctx:total_cost()
|
||
if cost >= config.cost.warn_at_dollars then
|
||
-- R10: 6-decimal format for sub-cent visibility
|
||
renderer.status(("session cost $%.6f has crossed warn_at_dollars=$%.6f")
|
||
:format(cost, config.cost.warn_at_dollars))
|
||
cw.dollars = true
|
||
end
|
||
end
|
||
if config.cost.warn_at_tokens and not cw.tokens then
|
||
local p, c = ctx:total_tokens()
|
||
if (p + c) >= config.cost.warn_at_tokens then
|
||
renderer.status(("session tokens %d has crossed warn_at_tokens=%d")
|
||
:format(p + c, config.cost.warn_at_tokens))
|
||
cw.tokens = true
|
||
end
|
||
end
|
||
end
|
||
```
|
||
|
||
One-shot per threshold per session. `:cost reset` clears both
|
||
totals AND both warn flags atomically.
|
||
|
||
---
|
||
|
||
## 8. UX Surface Summary
|
||
|
||
| Meta | Behavior |
|
||
|---|---|
|
||
| `:cost` | One-line summary: calls / tokens / cost |
|
||
| `:cost detail` | Per-model + per-category breakdown |
|
||
| `:cost reset` | Zero out totals + clear warn-fired flag |
|
||
|
||
| Config | Default | Effect |
|
||
|---|---|---|
|
||
| `cfg.cost.warn_at_dollars` | nil | Status when cumulative cost first crosses this dollar amount |
|
||
| `cfg.cost.warn_at_tokens` | nil | Status when cumulative total tokens first crosses |
|
||
| (broker `opts.include_usage`) | true | Adds `stream_options.include_usage = true` to outbound request |
|
||
|
||
R9 boundary note: `:resume <name>` reloads turns for conversation
|
||
continuity but does NOT reconstruct `ctx.usage_totals` from the
|
||
per-turn `usage` fields stored in the session JSONL. After `:resume`,
|
||
the cost meter starts fresh from zero for the resumed session's live
|
||
calls. The historical usage IS in the JSONL for after-the-fact
|
||
scripting; cross-session aggregation is Q-C2 deferred work.
|
||
|
||
---
|
||
|
||
## 9. Out of Scope (Phase 7)
|
||
|
||
- **Cross-session cost persistence** — Q-C2 defers `<history.dir>/cost.jsonl`
|
||
rollup; v1 is session-only. Per-turn usage IS in the session JSONL for
|
||
after-the-fact aggregation if anyone wants to script it.
|
||
- **Per-model rate limiting / cost caps that REFUSE the call** — v1 only
|
||
warns. A future phase could add a hard cap that aborts before the
|
||
broker call.
|
||
- **Pricing-table fallback for local models** — if a local model doesn't
|
||
emit `usage.cost`, we record 0. Estimating cost from token count + a
|
||
static pricing table is a future polish (most users won't care about
|
||
local "cost" anyway — local is free).
|
||
- **Pretty token-bandwidth charts / sparklines** — out of scope; the
|
||
detail breakdown is text-only.
|
||
- **Estimated cost for future turns** — no preflight cost prediction.
|
||
- **MCP tool-call usage** — MCP servers don't expose token usage;
|
||
broker calls invoked DURING MCP tool dispatch ARE captured (because
|
||
they go through the same path), but the MCP tool call itself isn't.
|
||
|
||
---
|
||
|
||
## 10. Risks
|
||
|
||
| Risk | Mitigation |
|
||
|---|---|
|
||
| Some providers reject `stream_options` -> SSE errors at the top of the stream | `opts.include_usage = false` opt-out per call site; baseline-time probe of the actual hossenfelder broker behavior |
|
||
| OpenRouter `cost` field shape varies between providers (Bedrock vs. Baidu vs. Together vs. ...) | Capture `usage.cost` as-is (number); document that the same provider must be used for cross-call comparison |
|
||
| Local llama.cpp returns no `cost` -> displayed `$0` could mislead user "is this REALLY free?" | `:cost detail` annotates local lines with `(local)` literal; summary says `cost=$X (cloud only; local: 0)` |
|
||
| `ctx.usage_totals` grows unboundedly with new model names mid-session | Bounded by `#models in config` × `#categories` — small constants. No mitigation needed. |
|
||
| Warn threshold fires once and never again for a long-running session that crosses 2x / 10x the threshold | Acceptable for v1; user can `:cost reset` to re-arm. Future polish: warn at each Nx multiple. |
|
||
| R8: `call_broker` fallback retry passes `opts.include_usage` unchanged | Documented assumption: B1 confirmed both backends accept the flag. If a future fallback host rejects, the call-site that knows can pass `opts.include_usage = false` explicitly. |
|
||
|
||
---
|
||
|
||
## 11. Open Questions (Phase 7)
|
||
|
||
| # | Question | Impact | Resolution target |
|
||
|---|---|---|---|
|
||
| Q-C1 | Provider-without-usage handling | A10 — defensive silent skip; baseline probe will confirm shape on local llama.cpp. |
|
||
| Q-C2 | Cross-session cost persistence (`cost.jsonl`) | Deferred to follow-up phase 8; v1 is session-only. |
|
||
| Q-C3 | Categories closed-set vs free-form | A4 — **free-form**; caller decides. Matches Phase 6 helpers/skills convention. |
|
||
| Q-C4 | `stream_options` forwarding by hossenfelder | B1 RESOLVED — both backends accept; flag is REQUIRED for local llama.cpp, no-op for cloud. Default-true is correct. |
|
||
| Q-C5 | Warn fires on the crossed call or the next | A5 — **on the crossed call** (no UX-defeating delay). |
|
||
| Q-C6 | `:reset` clears `cost_warn_fired` | A6 — **no**, only `:cost reset` clears the flag (R8 parity). |
|
||
|
||
---
|
||
|
||
## 12. Phase 7 → Phase 8+ Out-of-band
|
||
|
||
Candidate follow-ups (non-binding):
|
||
|
||
- **Phase 8**: cross-session cost persistence (Q-C2 deferral), with
|
||
optional cost dashboards / weekly rollup reporter.
|
||
- **Hard rate limits / cost caps that REFUSE the call** — an extension
|
||
of the warn surface that promotes warnings into preflight enforcement.
|
||
- **Better tokenization** (Q1 deferred-from-Phase-3): replace the char/4
|
||
heuristic on `Context:estimate_tokens()` with model `/tokenize` calls.
|
||
Indirectly improves accuracy of any future "preflight cost predictor".
|
||
|
||
Phase 7 itself is self-contained — no upstream dependencies.
|
||
|
||
---
|
||
|
||
## 13. Implementation Plan (commit-by-commit)
|
||
|
||
Bottom-up; broker first (it's the egress point that all callers
|
||
depend on), then context (the accumulator), then the call-site
|
||
rewires, then the user-facing meta + warn surface, then config +
|
||
status bump. Each commit leaves the tree green (existing tests +
|
||
load smoke + per-commit feature smoke).
|
||
|
||
### Order
|
||
|
||
1. **`broker.lua` — usage capture + signature widening.**
|
||
- `build_request(model_cfg, messages, stream, opts)` widened to
|
||
take an opts table; opts.tools / opts.max_tokens fold in from
|
||
the existing positional args.
|
||
- **R3: TWO internal callers of `build_request` exist inside
|
||
broker.lua itself** (`M.chat_stream` at line 65-66 and indirectly
|
||
via `M.chat`). Both must be updated in this commit; the
|
||
migration is CONTAINED but not zero-touch. "Every caller already
|
||
passes opts" refers to the public surface — internal `build_request`
|
||
was positional.
|
||
- Opts.include_usage (default true) adds `stream_options.include_usage
|
||
= true` to the request body (per B1, required for local).
|
||
- `M.chat_stream` event loop adds `if doc.usage then final_usage =
|
||
doc.usage end`; after `curl.post_sse` returns, if `final_usage`
|
||
is set, `on_delta("usage", payload)` is called. Payload includes
|
||
`model = model_cfg.model` (caller-stable per B4 + R2), the raw
|
||
token counts, and `cost` as a number (nil for local per B3).
|
||
- opts.category passthrough — the broker just echoes it into the
|
||
emitted usage payload; doesn't validate (per A4 free-form).
|
||
- **R1: `M.chat` (non-streaming wrapper) MUST capture usage in its
|
||
internal on_delta and return `(text, usage)`. Without this, four
|
||
out of five non-streaming categories silently report zero.** §4
|
||
shows the explicit update.
|
||
- Smoke: hand-build a request with stream_options, capture all
|
||
three on_delta kinds (text, tool_call when applicable, usage),
|
||
confirm usage payload matches what curl shows. Also smoke
|
||
`broker.chat(...)` returns non-nil usage for cloud calls.
|
||
|
||
2. **`context.lua` — accumulator + helpers.**
|
||
- `Context.new`: `self.usage_totals = {}` + `self.cost_warn_fired = false`.
|
||
- `Context:add_usage(model, category, usage)` — increments
|
||
`usage_totals[model][category]` slots.
|
||
- `Context:total_cost()` — sums all cost fields across all models/categories.
|
||
- `Context:total_tokens()` — sums prompt + completion separately.
|
||
- `Context:reset` — does NOT touch `usage_totals` or `cost_warn_fired`
|
||
(R8 parity with `memory_items` and `project`).
|
||
- Smoke: 4-case inline test of add_usage / totals / reset preservation.
|
||
|
||
3. **`repl.lua` — wire opts.category + on_delta("usage") at non-Norris call sites.**
|
||
**N3: depends on commit 1's R1 M.chat fix shipping first.** This
|
||
commit's "capture the second return value" pattern only works
|
||
after M.chat actually returns one.
|
||
- `_record_usage(model, category, usage)` helper (R5) — the single
|
||
chokepoint that wraps `ctx:add_usage` AND does the warn check.
|
||
Replaces all direct `ctx:add_usage(...)` invocations in repl.lua.
|
||
- call_broker wrapper (used by ask_ai): pass `opts.category =
|
||
"main"`; the wrapped on_delta handles `kind == "usage"` by
|
||
calling `_record_usage(payload.model, payload.category, payload)`
|
||
— keys by **payload.model** per R2 (handles fallback retry
|
||
correctly without tracking primary-vs-fallback at the wrapper).
|
||
- DELEGATE: handler: opts.category = "delegate"; capture second
|
||
return value from broker.chat and feed to `_record_usage`.
|
||
- :delegate meta: opts.category = "delegate"; same.
|
||
- summarize-on-evict callback: opts.category = "summarize"; same.
|
||
- :memory summarize: opts.category = "memory_summarize"; same.
|
||
- Smoke: send one cloud prompt, observe ctx.usage_totals grows;
|
||
also smoke the fallback path with a deliberately-broken primary
|
||
and confirm usage credits the fallback model name (R2 verification).
|
||
|
||
4. **`safety.lua` — opts.category for Norris + probe.**
|
||
- safety.norris_step's broker.chat_stream call: pass `opts.category
|
||
= "norris"`. The on_delta wrapper inside safety.lua already
|
||
widens (post-#52) to handle `kind == "text"` (rehydration);
|
||
now also handles `kind == "usage"` by calling
|
||
`helpers.on_usage(payload.model, payload.category, payload)`.
|
||
R5: helpers.on_usage IS repl.lua's `_record_usage`.
|
||
- **N4 signature chain widening**: `llm_probe`, `llm_second_opinion`,
|
||
and `M.is_destructive` all widen to thread `opts.on_usage` through:
|
||
- `llm_probe(model_cfg, system, cmd, opts)` — pass `opts.category
|
||
= "probe"` to broker.chat; on the `(text, usage)` return,
|
||
if `opts.on_usage` AND `usage`, call `opts.on_usage(usage.model,
|
||
usage.category, usage)`.
|
||
- `llm_second_opinion(cmd, cfg, opts)` — pass opts through to
|
||
both llm_probe calls (probe 1 + probe 2 re-roll).
|
||
- `M.is_destructive(cmd, cfg, opts)` — opts.on_usage already in
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the table from #52's scrub_msgs/rehydrate addition; threads
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through naturally.
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- Smoke: a Norris session shows both "norris" and "probe" category
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entries in :cost detail; the probe model is named correctly
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(e.g. "cloud" if safety.llm_model = "cloud").
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||
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5. **`repl.lua` — :cost meta + warn-threshold + HELP.**
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- :cost (summary), :cost detail (per-model+category breakdown),
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:cost reset (zero totals + clear cost_warn_fired).
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- After every ctx:add_usage call (centralized in a helper if
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possible), check cfg.cost.warn_at_dollars / warn_at_tokens;
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emit one-shot status if crossed AND cost_warn_fired is false.
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- HELP gains 3 lines for :cost.
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- Smoke: :cost shows totals; :cost detail breaks down; warn fires
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once when threshold crossed; :cost reset re-arms.
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||
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6. **`config.lua` example block + `docs/PHASE7.md` status bump.**
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- Commented-out `cost = { warn_at_dollars = 0.50, warn_at_tokens
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||
= 100000 }` block in config.lua.
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- **N5: PHASE0.md §11 amendment is already in tree** (committed
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at `3bad07b` with the formulate doc). Commit 6 must NOT re-apply.
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- PHASE7.md status header → **Implement** (matches Phase 5/6
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||
cadence — manifest tracks implementation state).
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||
|
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### Risk index per commit
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||
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||
| Commit | Risk | Mitigation |
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||
|---|---|---|
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||
| 1 (broker) | R3: build_request has TWO INTERNAL callers in broker.lua; both must be updated in this commit | Explicit in commit-1 note above; grep `build_request\(` to confirm |
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||
| 1 (broker) | R1: M.chat must capture usage in on_delta and return (text, usage) | §4 shows the explicit M.chat update; smoke test verifies non-nil usage on cloud call |
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||
| 1 (broker) | `M.chat` second return value confuses callers that do `local r = broker.chat(...)` discarding the second | Lua doesn't error on dropped return values; backward-compat preserved automatically |
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||
| 2 (context) | usage_totals nil on old ctx serializations | Defensive `self.usage_totals = self.usage_totals or {}` in add_usage; no migration needed |
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||
| 3 (repl wires) | Forgetting one call site = silent under-count | Lint by grep for `broker.chat\(` and `broker.chat_stream\(` after the wire commit; ensure each is tagged with opts.category |
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||
| 3 (repl wires) | R2: fallback retry credits usage to wrong model | wrapped on_delta keys by `payload.model` (set inside broker per R2), NOT by outer `model_name`; smoke a deliberately-broken-primary case |
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||
| 4 (safety wires) | safety.lua must NOT introduce new module dep | Use helpers.on_usage callback convention (matches #52's scrub_msgs) |
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||
| 4 (safety wires) | N4: llm_probe → llm_second_opinion → is_destructive signature chain widening | Spelled out in commit-4 note above |
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||
| 5 (:cost + warn) | warn fires multiple times when threshold is much exceeded by one call | per-threshold one-shot flag in `ctx.cost_warn_state`; explicit :cost reset to re-arm both |
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||
| 5 (:cost + warn) | R4: single shared flag covers two thresholds | RESOLVED — split into `cost_warn_state.dollars` + `.tokens` |
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||
| 6 (config + status) | N5: PHASE0 §11 already amended at `3bad07b` | This commit does NOT re-apply the amendment |
|
||
|
||
### Tests + smoke per commit
|
||
|
||
Each commit:
|
||
- Pass `luajit test_safety.lua` (87/87) and `luajit test_router_model.lua` (31/31)
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||
- Load cleanly via `luajit -e 'package.path=...; require("repl"); print("ok")'`
|
||
- Pass a per-feature smoke (described in each row above)
|
||
|
||
### Things deliberately NOT split
|
||
|
||
- broker.chat backward-compat shim — Lua's multiple-return-values
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||
semantics handle it automatically (existing `local r = broker.chat(..)`
|
||
drops the new `usage` value).
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||
- Per-category sub-tables — flat `model -> category -> counters` is
|
||
simple enough; nesting deeper for e.g. timestamps is v2.
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||
- Cross-session persistence — explicitly Q-C2 deferred to phase 8.
|
||
|
||
### Open at plan-time (resolve at implement)
|
||
|
||
- Whether `safety.is_destructive`'s opts should carry `on_usage`
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||
callback explicitly OR thread through cfg.helpers (the latter
|
||
matches the Norris helpers convention but is more coupling).
|
||
Decide at commit 4. Default to explicit opts.on_usage for minimum
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||
surface.
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||
- Whether to emit a `[aish] usage: model=X prompt=N completion=M cost=$X`
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||
status line PER TURN (verbose mode) or only via :cost on demand.
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||
v1 = on demand only; verbose mode is a follow-up nice-to-have.
|