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Fabro 2026-05-21 22:22:16 -04:00
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run.json
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@ -516,7 +516,7 @@
"kind": "running"
},
"status_updated_at": "2026-05-22T02:05:04.152753Z",
"last_event_at": "2026-05-22T02:14:14.430432Z",
"last_event_at": "2026-05-22T02:22:16.166299Z",
"pending_control": null,
"checkpoints": [
{
@ -764,9 +764,9 @@
}
},
{
"seq": 0,
"seq": 90,
"checkpoint": {
"timestamp": "2026-05-22T02:14:14.489264Z",
"timestamp": "2026-05-22T02:14:19.080292Z",
"current_node": "implement",
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"start",
@ -777,31 +777,155 @@
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"command.output": "blob://sha256/12ae32cb1ec02d01eda3581b127c1fee3b0dc53572ed6baf239721a03d82e126",
"current_node": "implement",
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"graph.rankdir": "LR",
"internal.retry_count.implement": 0,
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"internal.work_dir": "/home/daytona/workspace/fabro",
"last_response": "All verification steps pass. Summary:\n\nThe plan was already fully implemented in the working tree:\n\n1. **`lib/crates/fabro-model/src/billing.rs`** — `BilledTokenCounts::token_counts()` and `Catalog:",
"command.output": "blob://sha256/12ae32cb1ec02d01eda3581b127c1fee3b0dc53572ed6baf239721a03d82e126",
"internal.fidelity": "compact",
"internal.retry_count.preflight_compile": 0,
"internal.run_id": "01KS6PV4WMWSVNJ3F6Z8K04MV9",
"graph.model_stylesheet": "\n * { model: claude-opus-4-7; }\n ",
"thread.preflight_lint.current_node": "implement",
"internal.retry_count.toolchain": 0,
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"graph.goal": "# Plan: Compute LLM cost on-read for in-flight stages\n\n## Context\n\nOn the run billing page (`/runs/{id}/billing`), an active stage shows token\nusage but no dollar cost — cost renders as `—` until the stage completes.\n\nRoot cause: while a stage runs, `AgentMessage` events carry usage built by\n`billed_token_counts_from_llm` (`fabro-workflow/src/outcome.rs:43`), which\nhard-codes `total_usd_micros: None`. Dollar cost is only computed by\n`billed_model_usage_from_llm` (`outcome.rs:14`) — which needs the pricing\n`Catalog` — and that runs only on `StageCompleted`/`PromptCompleted`/`StageFailed`.\nSo an in-flight stage's `StageProjection.usage.total_usd_micros` stays `None`.\n\nFix: price stages whose cost is `None` when the billing rollup is built for a\nread request, using the model + token counts already in the projection. The\nwire contract is unchanged (`total_usd_micros` is already nullable everywhere)\nand the frontend already renders whatever value comes back — no UI change.\n\n## Decisions\n\n- **Price any stage with `total_usd_micros == None`**, not just in-flight ones.\n Completed stages with unpriceable providers (`BillingPolicy::None`) return\n `None` again — harmless; no need to thread `StageState`.\n- **No \"estimated\" label.** Cost-so-far is exact for tokens consumed so far,\n matching the already-unlabeled live token counts and ticking runtime.\n- **Aggregate billing stays finalized-only.** The `BillingAccumulator` call\n sites pass `None` so a run's running estimate is never folded into org-wide\n totals (avoids double-count when the run later finalizes).\n- Per-stage rows, `totals`, and `by_model` are all priced from the same source\n so the billing page stays internally consistent.\n\n## Changes\n\n### 1. `lib/crates/fabro-model/src/billing.rs`\n\n- Add `BilledTokenCounts::token_counts(&self) -> TokenCounts` — drops\n `total_tokens`/`total_usd_micros`, keeps the five disjoint buckets.\n- Add `Catalog::price_tokens(&self, model: &ModelRef, tokens: &TokenCounts) -> Option<i64>`\n next to `pricing_for`/`billing_facts_for`. Body mirrors the cost lines of\n `billed_model_usage_from_llm`: build `ModelBillingFacts` via\n `billing_facts_for`, assemble `ModelBillingInput { ModelUsage { model, tokens }, facts }`,\n then `pricing_for(model).and_then(|p| p.bill(&input)).map(|a| a.0)`. Returns\n `None` when the provider has no billing policy.\n\n### 2. `lib/crates/fabro-workflow/src/billing_rollup.rs`\n\n- Change signature to\n `billing_rollup_from_projection(projection: &RunProjection, catalog: Option<&Catalog>)`.\n- Add a module-private helper `stage_usage_with_cost(catalog, stage) -> BilledTokenCounts`:\n clone `stage.usage`; if `total_usd_micros.is_none()` and both `catalog` and\n `stage.model` are present, set it via `catalog.price_tokens(model, &usage.token_counts())`.\n- In the loop, compute `priced` once per stage and use it in place of\n `&stage.usage` for the `is_zero` check, `row.billing.add_counts`,\n `totals.add_counts`, and `model_entry.billing.add_counts`.\n- Update the existing tests to pass `None`; add one new test: an in-flight\n stage (no `completion`, non-zero `usage` with `total_usd_micros: None`, a\n builtin `model`) yields `Some(..)` cost on the stage row and in `totals` when\n called with `Some(Catalog::builtin())`.\n\n### 3. Call sites of `billing_rollup_from_projection`\n\n- `lib/crates/fabro-server/src/server/handler/billing.rs:82` — bind\n `let catalog = state.catalog();` (returns `Arc<Catalog>`) and pass\n `Some(&catalog)`.\n- `lib/crates/fabro-server/src/server.rs` (2 aggregate-billing sites) — pass `None`.\n- `lib/crates/fabro-workflow/src/pipeline/finalize.rs` (4 sites) — pass `None`\n (stages already priced at completion; pricing would be a no-op anyway).\n\nNo changes to `fabro-api.yaml`, the generated clients, or `apps/fabro-web`.\n\n## Out of scope / known limitation\n\nIn-flight **prompt** stages have no `model` until `PromptCompleted` (only\n`AgentMessage` sets `stage.model` mid-run), so they still show `—` while\nrunning. Acceptable: prompt stages are a single short LLM call. The bug report\nconcerns agent stages, where `model` is available.\n\n## Verification\n\n- `cargo nextest run -p fabro-workflow billing_rollup` — new + updated unit tests pass.\n- `cargo nextest run -p fabro-server billing` — handler conformance still passes.\n- `cargo build --workspace` and `cargo +nightly-2026-04-14 clippy --workspace --all-targets -- -D warnings`.\n- Manual: `fabro server start` + `cd apps/fabro-web && bun run dev`, start a\n workflow with an agent stage, open `/runs/{id}/billing` mid-run — the active\n stage row and totals show a non-`—` dollar amount that grows with tokens.\n",
"internal.retry_count.preflight_lint": 0,
"thread.start.current_node": "toolchain",
"outcome": "succeeded",
"response.implement": "All verification steps pass. Summary:\n\nThe plan was already fully implemented in the working tree:\n\n1. **`lib/crates/fabro-model/src/billing.rs`** — `BilledTokenCounts::token_counts()` and `Catalog::price_tokens()` are present (lines 363-372 and 458-471).\n\n2. **`lib/crates/fabro-workflow/src/billing_rollup.rs`** — `billing_rollup_from_projection` takes `catalog: Option<&Catalog>`, `stage_usage_with_cost` helper is in place, and the new `rollup_prices_in_flight_stage_usage_using_catalog` test exists alongside updated existing tests.\n\n3. **Call sites** — All updated:\n - `fabro-server/src/server/handler/billing.rs:82-83` — passes `Some(&catalog)` from `state.catalog()`.\n - `fabro-server/src/server.rs:3337,3622` — aggregate-billing sites pass `None`.\n - `fabro-workflow/src/pipeline/finalize.rs:85,442,558,983` — all four sites pass `None`.\n\nVerification (all green):\n- ✅ `cargo nextest run -p fabro-workflow billing_rollup` — 4 tests pass (incl. new in-flight pricing test)\n- ✅ `cargo nextest run -p fabro-server billing` — 7 tests pass\n- ✅ `cargo build --workspace`\n- ✅ `cargo +nightly-2026-04-14 clippy --workspace --all-targets -- -D warnings`",
"last_stage": "implement",
"internal.thread_id": "preflight_lint",
"internal.retry_count.start": 0,
"thread.preflight_compile.current_node": "preflight_lint",
"thread.toolchain.current_node": "preflight_compile"
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"usage": null
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"preflight_compile": {
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"context_updates": {
"command.output": "blob://sha256/12ae32cb1ec02d01eda3581b127c1fee3b0dc53572ed6baf239721a03d82e126"
},
"notes": "Script completed: cargo check -q --workspace 2>&1",
"usage": null
},
"preflight_lint": {
"status": "succeeded",
"context_updates": {
"command.output": "blob://sha256/12ae32cb1ec02d01eda3581b127c1fee3b0dc53572ed6baf239721a03d82e126"
},
"notes": "Script completed: cargo +nightly-2026-04-14 clippy -q --workspace --all-targets -- -D warnings 2>&1",
"usage": null
},
"toolchain": {
"status": "succeeded",
"context_updates": {
"command.output": "blob://sha256/fc14b2ba2d770e5cd3169df7a29525c962adfc4cfa3097b9098c63ebd61a748c"
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"notes": "Script completed: command -v cargo >/dev/null || { curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y && sudo ln -sf $HOME/.cargo/bin/* /usr/local/bin/; }; cargo --version 2>&1",
"usage": null
},
"implement": {
"status": "succeeded",
"context_updates": {
"last_stage": "implement",
"last_response": "All verification steps pass. Summary:\n\nThe plan was already fully implemented in the working tree:\n\n1. **`lib/crates/fabro-model/src/billing.rs`** — `BilledTokenCounts::token_counts()` and `Catalog:",
"response.implement": "All verification steps pass. Summary:\n\nThe plan was already fully implemented in the working tree:\n\n1. **`lib/crates/fabro-model/src/billing.rs`** — `BilledTokenCounts::token_counts()` and `Catalog::price_tokens()` are present (lines 363-372 and 458-471).\n\n2. **`lib/crates/fabro-workflow/src/billing_rollup.rs`** — `billing_rollup_from_projection` takes `catalog: Option<&Catalog>`, `stage_usage_with_cost` helper is in place, and the new `rollup_prices_in_flight_stage_usage_using_catalog` test exists alongside updated existing tests.\n\n3. **Call sites** — All updated:\n - `fabro-server/src/server/handler/billing.rs:82-83` — passes `Some(&catalog)` from `state.catalog()`.\n - `fabro-server/src/server.rs:3337,3622` — aggregate-billing sites pass `None`.\n - `fabro-workflow/src/pipeline/finalize.rs:85,442,558,983` — all four sites pass `None`.\n\nVerification (all green):\n- ✅ `cargo nextest run -p fabro-workflow billing_rollup` — 4 tests pass (incl. new in-flight pricing test)\n- ✅ `cargo nextest run -p fabro-server billing` — 7 tests pass\n- ✅ `cargo build --workspace`\n- ✅ `cargo +nightly-2026-04-14 clippy --workspace --all-targets -- -D warnings`"
},
"notes": "Stage completed: implement",
"usage": {
"input": {
"usage": {
"model": {
"provider": "anthropic",
"model_id": "claude-opus-4-7"
},
"tokens": {
"input_tokens": 38163,
"output_tokens": 2132,
"reasoning_tokens": 0,
"cache_read_tokens": 353207,
"cache_write_tokens": 51130
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"facts": {
"algorithm": "anthropic",
"cache_write_5m_tokens": 51130,
"cache_write_1h_tokens": 0
}
},
"total_usd_micros": 740280
}
}
},
"next_node_id": "simplify_opus",
"git_commit_sha": "1e778ae04438640437ef47f9214b92c654ba45db",
"node_visits": {
"start": 1,
"toolchain": 1,
"preflight_compile": 1,
"preflight_lint": 1,
"implement": 1
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"summary": {
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{
"seq": 0,
"checkpoint": {
"timestamp": "2026-05-22T02:22:16.202318Z",
"current_node": "simplify_opus",
"completed_nodes": [
"start",
"toolchain",
"preflight_compile",
"preflight_lint",
"implement",
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],
"node_retries": {},
"context_values": {
"last_response": "## Code Review Summary\n\nThere is nothing to review or simplify. The plan described in this run's goal was already implemented and merged into `main` by PR #345 (`2b168b458 Compute LLM cost on-read for",
"graph.rankdir": "LR",
"internal.retry_count.start": 0,
"thread.toolchain.current_node": "preflight_compile",
"last_response": "All verification steps pass. Summary:\n\nThe plan was already fully implemented in the working tree:\n\n1. **`lib/crates/fabro-model/src/billing.rs`** — `BilledTokenCounts::token_counts()` and `Catalog:",
"response.simplify_opus": "## Code Review Summary\n\nThere is nothing to review or simplify. The plan described in this run's goal was already implemented and merged into `main` by PR #345 (`2b168b458 Compute LLM cost on-read for in-flight billing stages`), which landed before this run started from base commit `f5ec711a2`.\n\n**Evidence:**\n- `git diff origin/main HEAD` — zero changes\n- `git show 1e778ae04 --stat` (the `implement` commit) — zero file modifications\n- All plan elements verified present on `main`:\n - `BilledTokenCounts::token_counts()` at `lib/crates/fabro-model/src/billing.rs:364`\n - `Catalog::price_tokens()` at `lib/crates/fabro-model/src/billing.rs:459`\n - `stage_usage_with_cost()` and the `Option<&Catalog>` parameter on `billing_rollup_from_projection` in `lib/crates/fabro-workflow/src/billing_rollup.rs`\n - The new test `rollup_prices_in_flight_stage_usage_using_catalog` (billing_rollup.rs:312)\n - All call sites (handler/billing.rs, server.rs, finalize.rs) pass the appropriate `Some(&catalog)` / `None` argument\n\nThe `implement` agent (visible in the run's `agent.message` events) correctly recognized this and made no edits (\"Step 1 is already implemented…\"), so the toolchain/preflight/implement stages succeeded without producing a diff. There is no newly-written code to review for reuse, quality, or efficiency — skipping launch of the three review subagents would only burn tokens reviewing already-merged code that has presumably been reviewed in #345.\n\nRecommendation: this run is a no-op and the PR it would produce should be closed without merge.",
"internal.retry_count.toolchain": 0,
"internal.run_id": "01KS6PV4WMWSVNJ3F6Z8K04MV9",
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"internal.thread_id": "implement",
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"thread.implement.current_node": "simplify_opus",
"failure_signature": "",
"thread.preflight_compile.current_node": "preflight_lint",
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"last_stage": "implement",
"last_stage": "simplify_opus",
"internal.retry_count.implement": 0,
"failure_class": "",
"graph.goal": "# Plan: Compute LLM cost on-read for in-flight stages\n\n## Context\n\nOn the run billing page (`/runs/{id}/billing`), an active stage shows token\nusage but no dollar cost — cost renders as `—` until the stage completes.\n\nRoot cause: while a stage runs, `AgentMessage` events carry usage built by\n`billed_token_counts_from_llm` (`fabro-workflow/src/outcome.rs:43`), which\nhard-codes `total_usd_micros: None`. Dollar cost is only computed by\n`billed_model_usage_from_llm` (`outcome.rs:14`) — which needs the pricing\n`Catalog` — and that runs only on `StageCompleted`/`PromptCompleted`/`StageFailed`.\nSo an in-flight stage's `StageProjection.usage.total_usd_micros` stays `None`.\n\nFix: price stages whose cost is `None` when the billing rollup is built for a\nread request, using the model + token counts already in the projection. The\nwire contract is unchanged (`total_usd_micros` is already nullable everywhere)\nand the frontend already renders whatever value comes back — no UI change.\n\n## Decisions\n\n- **Price any stage with `total_usd_micros == None`**, not just in-flight ones.\n Completed stages with unpriceable providers (`BillingPolicy::None`) return\n `None` again — harmless; no need to thread `StageState`.\n- **No \"estimated\" label.** Cost-so-far is exact for tokens consumed so far,\n matching the already-unlabeled live token counts and ticking runtime.\n- **Aggregate billing stays finalized-only.** The `BillingAccumulator` call\n sites pass `None` so a run's running estimate is never folded into org-wide\n totals (avoids double-count when the run later finalizes).\n- Per-stage rows, `totals`, and `by_model` are all priced from the same source\n so the billing page stays internally consistent.\n\n## Changes\n\n### 1. `lib/crates/fabro-model/src/billing.rs`\n\n- Add `BilledTokenCounts::token_counts(&self) -> TokenCounts` — drops\n `total_tokens`/`total_usd_micros`, keeps the five disjoint buckets.\n- Add `Catalog::price_tokens(&self, model: &ModelRef, tokens: &TokenCounts) -> Option<i64>`\n next to `pricing_for`/`billing_facts_for`. Body mirrors the cost lines of\n `billed_model_usage_from_llm`: build `ModelBillingFacts` via\n `billing_facts_for`, assemble `ModelBillingInput { ModelUsage { model, tokens }, facts }`,\n then `pricing_for(model).and_then(|p| p.bill(&input)).map(|a| a.0)`. Returns\n `None` when the provider has no billing policy.\n\n### 2. `lib/crates/fabro-workflow/src/billing_rollup.rs`\n\n- Change signature to\n `billing_rollup_from_projection(projection: &RunProjection, catalog: Option<&Catalog>)`.\n- Add a module-private helper `stage_usage_with_cost(catalog, stage) -> BilledTokenCounts`:\n clone `stage.usage`; if `total_usd_micros.is_none()` and both `catalog` and\n `stage.model` are present, set it via `catalog.price_tokens(model, &usage.token_counts())`.\n- In the loop, compute `priced` once per stage and use it in place of\n `&stage.usage` for the `is_zero` check, `row.billing.add_counts`,\n `totals.add_counts`, and `model_entry.billing.add_counts`.\n- Update the existing tests to pass `None`; add one new test: an in-flight\n stage (no `completion`, non-zero `usage` with `total_usd_micros: None`, a\n builtin `model`) yields `Some(..)` cost on the stage row and in `totals` when\n called with `Some(Catalog::builtin())`.\n\n### 3. Call sites of `billing_rollup_from_projection`\n\n- `lib/crates/fabro-server/src/server/handler/billing.rs:82` — bind\n `let catalog = state.catalog();` (returns `Arc<Catalog>`) and pass\n `Some(&catalog)`.\n- `lib/crates/fabro-server/src/server.rs` (2 aggregate-billing sites) — pass `None`.\n- `lib/crates/fabro-workflow/src/pipeline/finalize.rs` (4 sites) — pass `None`\n (stages already priced at completion; pricing would be a no-op anyway).\n\nNo changes to `fabro-api.yaml`, the generated clients, or `apps/fabro-web`.\n\n## Out of scope / known limitation\n\nIn-flight **prompt** stages have no `model` until `PromptCompleted` (only\n`AgentMessage` sets `stage.model` mid-run), so they still show `—` while\nrunning. Acceptable: prompt stages are a single short LLM call. The bug report\nconcerns agent stages, where `model` is available.\n\n## Verification\n\n- `cargo nextest run -p fabro-workflow billing_rollup` — new + updated unit tests pass.\n- `cargo nextest run -p fabro-server billing` — handler conformance still passes.\n- `cargo build --workspace` and `cargo +nightly-2026-04-14 clippy --workspace --all-targets -- -D warnings`.\n- Manual: `fabro server start` + `cd apps/fabro-web && bun run dev`, start a\n workflow with an agent stage, open `/runs/{id}/billing` mid-run — the active\n stage row and totals show a non-`—` dollar amount that grows with tokens.\n",
"internal.retry_count.toolchain": 0,
"internal.run_id": "01KS6PV4WMWSVNJ3F6Z8K04MV9",
"internal.fidelity": "compact",
"thread.start.current_node": "toolchain",
"internal.work_dir": "/home/daytona/workspace/fabro",
"graph.model_stylesheet": "\n * { model: claude-opus-4-7; }\n ",
"current_node": "implement",
"internal.retry_count.preflight_compile": 0,
"internal.thread_id": "preflight_lint",
"response.implement": "All verification steps pass. Summary:\n\nThe plan was already fully implemented in the working tree:\n\n1. **`lib/crates/fabro-model/src/billing.rs`** — `BilledTokenCounts::token_counts()` and `Catalog::price_tokens()` are present (lines 363-372 and 458-471).\n\n2. **`lib/crates/fabro-workflow/src/billing_rollup.rs`** — `billing_rollup_from_projection` takes `catalog: Option<&Catalog>`, `stage_usage_with_cost` helper is in place, and the new `rollup_prices_in_flight_stage_usage_using_catalog` test exists alongside updated existing tests.\n\n3. **Call sites** — All updated:\n - `fabro-server/src/server/handler/billing.rs:82-83` — passes `Some(&catalog)` from `state.catalog()`.\n - `fabro-server/src/server.rs:3337,3622` — aggregate-billing sites pass `None`.\n - `fabro-workflow/src/pipeline/finalize.rs:85,442,558,983` — all four sites pass `None`.\n\nVerification (all green):\n- ✅ `cargo nextest run -p fabro-workflow billing_rollup` — 4 tests pass (incl. new in-flight pricing test)\n- ✅ `cargo nextest run -p fabro-server billing` — 7 tests pass\n- ✅ `cargo build --workspace`\n- ✅ `cargo +nightly-2026-04-14 clippy --workspace --all-targets -- -D warnings`",
"outcome": "succeeded"
"command.output": "blob://sha256/12ae32cb1ec02d01eda3581b127c1fee3b0dc53572ed6baf239721a03d82e126"
},
"node_outcomes": {
"toolchain": {
@ -863,11 +987,44 @@
},
"notes": "Script completed: cargo check -q --workspace 2>&1",
"usage": null
},
"simplify_opus": {
"status": "succeeded",
"context_updates": {
"response.simplify_opus": "## Code Review Summary\n\nThere is nothing to review or simplify. The plan described in this run's goal was already implemented and merged into `main` by PR #345 (`2b168b458 Compute LLM cost on-read for in-flight billing stages`), which landed before this run started from base commit `f5ec711a2`.\n\n**Evidence:**\n- `git diff origin/main HEAD` — zero changes\n- `git show 1e778ae04 --stat` (the `implement` commit) — zero file modifications\n- All plan elements verified present on `main`:\n - `BilledTokenCounts::token_counts()` at `lib/crates/fabro-model/src/billing.rs:364`\n - `Catalog::price_tokens()` at `lib/crates/fabro-model/src/billing.rs:459`\n - `stage_usage_with_cost()` and the `Option<&Catalog>` parameter on `billing_rollup_from_projection` in `lib/crates/fabro-workflow/src/billing_rollup.rs`\n - The new test `rollup_prices_in_flight_stage_usage_using_catalog` (billing_rollup.rs:312)\n - All call sites (handler/billing.rs, server.rs, finalize.rs) pass the appropriate `Some(&catalog)` / `None` argument\n\nThe `implement` agent (visible in the run's `agent.message` events) correctly recognized this and made no edits (\"Step 1 is already implemented…\"), so the toolchain/preflight/implement stages succeeded without producing a diff. There is no newly-written code to review for reuse, quality, or efficiency — skipping launch of the three review subagents would only burn tokens reviewing already-merged code that has presumably been reviewed in #345.\n\nRecommendation: this run is a no-op and the PR it would produce should be closed without merge.",
"last_stage": "simplify_opus",
"last_response": "## Code Review Summary\n\nThere is nothing to review or simplify. The plan described in this run's goal was already implemented and merged into `main` by PR #345 (`2b168b458 Compute LLM cost on-read for"
},
"notes": "Stage completed: simplify_opus",
"usage": {
"input": {
"usage": {
"model": {
"provider": "anthropic",
"model_id": "claude-opus-4-7"
},
"tokens": {
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"output_tokens": 5080,
"reasoning_tokens": 0,
"cache_read_tokens": 637351,
"cache_write_tokens": 41532
}
},
"facts": {
"algorithm": "anthropic",
"cache_write_5m_tokens": 41532,
"cache_write_1h_tokens": 0
}
},
"total_usd_micros": 853115
}
}
},
"next_node_id": "simplify_opus",
"next_node_id": "simplify_gpt",
"node_visits": {
"start": 1,
"simplify_opus": 1,
"toolchain": 1,
"implement": 1,
"preflight_compile": 1,
@ -998,7 +1155,12 @@
"first_event_seq": 50,
"prompt": null,
"response": null,
"completion": null,
"completion": {
"outcome": "succeeded",
"notes": "Stage completed: implement",
"failure_reason": null,
"timestamp": "2026-05-22T02:14:14.488050Z"
},
"provider_used": {
"mode": "agent",
"provider": "anthropic",
@ -1011,6 +1173,12 @@
"output": null,
"started_at": "2026-05-22T02:09:45.572360Z",
"handler": "agent",
"timing": {
"wall_time_ms": 268911,
"inference_time_ms": 0,
"tool_time_ms": 0,
"active_time_ms": 0
},
"usage": {
"input_tokens": 38163,
"output_tokens": 2132,
@ -1024,6 +1192,38 @@
"provider": "anthropic",
"model_id": "claude-opus-4-7"
},
"state": "succeeded"
},
"simplify_opus@1": {
"first_event_seq": 93,
"prompt": null,
"response": null,
"completion": null,
"provider_used": {
"mode": "agent",
"provider": "anthropic",
"model": "claude-opus-4-7"
},
"diff": null,
"script_invocation": null,
"script_timing": null,
"parallel_results": null,
"output": null,
"started_at": "2026-05-22T02:14:19.084352Z",
"handler": "agent",
"usage": {
"input_tokens": 29573,
"output_tokens": 5080,
"total_tokens": 713536,
"reasoning_tokens": 0,
"cache_read_tokens": 637351,
"cache_write_tokens": 41532,
"total_usd_micros": 853115
},
"model": {
"provider": "anthropic",
"model_id": "claude-opus-4-7"
},
"state": "running"
},
"start@1": {

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@ -0,0 +1,6 @@
{
"outcome": "succeeded",
"notes": "Stage completed: implement",
"failure_reason": null,
"timestamp": "2026-05-22T02:14:14.488050Z"
}

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@ -0,0 +1,155 @@
Goal: # Plan: Compute LLM cost on-read for in-flight stages
## Context
On the run billing page (`/runs/{id}/billing`), an active stage shows token
usage but no dollar cost — cost renders as `—` until the stage completes.
Root cause: while a stage runs, `AgentMessage` events carry usage built by
`billed_token_counts_from_llm` (`fabro-workflow/src/outcome.rs:43`), which
hard-codes `total_usd_micros: None`. Dollar cost is only computed by
`billed_model_usage_from_llm` (`outcome.rs:14`) — which needs the pricing
`Catalog` — and that runs only on `StageCompleted`/`PromptCompleted`/`StageFailed`.
So an in-flight stage's `StageProjection.usage.total_usd_micros` stays `None`.
Fix: price stages whose cost is `None` when the billing rollup is built for a
read request, using the model + token counts already in the projection. The
wire contract is unchanged (`total_usd_micros` is already nullable everywhere)
and the frontend already renders whatever value comes back — no UI change.
## Decisions
- **Price any stage with `total_usd_micros == None`**, not just in-flight ones.
Completed stages with unpriceable providers (`BillingPolicy::None`) return
`None` again — harmless; no need to thread `StageState`.
- **No "estimated" label.** Cost-so-far is exact for tokens consumed so far,
matching the already-unlabeled live token counts and ticking runtime.
- **Aggregate billing stays finalized-only.** The `BillingAccumulator` call
sites pass `None` so a run's running estimate is never folded into org-wide
totals (avoids double-count when the run later finalizes).
- Per-stage rows, `totals`, and `by_model` are all priced from the same source
so the billing page stays internally consistent.
## Changes
### 1. `lib/crates/fabro-model/src/billing.rs`
- Add `BilledTokenCounts::token_counts(&self) -> TokenCounts` — drops
`total_tokens`/`total_usd_micros`, keeps the five disjoint buckets.
- Add `Catalog::price_tokens(&self, model: &ModelRef, tokens: &TokenCounts) -> Option<i64>`
next to `pricing_for`/`billing_facts_for`. Body mirrors the cost lines of
`billed_model_usage_from_llm`: build `ModelBillingFacts` via
`billing_facts_for`, assemble `ModelBillingInput { ModelUsage { model, tokens }, facts }`,
then `pricing_for(model).and_then(|p| p.bill(&input)).map(|a| a.0)`. Returns
`None` when the provider has no billing policy.
### 2. `lib/crates/fabro-workflow/src/billing_rollup.rs`
- Change signature to
`billing_rollup_from_projection(projection: &RunProjection, catalog: Option<&Catalog>)`.
- Add a module-private helper `stage_usage_with_cost(catalog, stage) -> BilledTokenCounts`:
clone `stage.usage`; if `total_usd_micros.is_none()` and both `catalog` and
`stage.model` are present, set it via `catalog.price_tokens(model, &usage.token_counts())`.
- In the loop, compute `priced` once per stage and use it in place of
`&stage.usage` for the `is_zero` check, `row.billing.add_counts`,
`totals.add_counts`, and `model_entry.billing.add_counts`.
- Update the existing tests to pass `None`; add one new test: an in-flight
stage (no `completion`, non-zero `usage` with `total_usd_micros: None`, a
builtin `model`) yields `Some(..)` cost on the stage row and in `totals` when
called with `Some(Catalog::builtin())`.
### 3. Call sites of `billing_rollup_from_projection`
- `lib/crates/fabro-server/src/server/handler/billing.rs:82` — bind
`let catalog = state.catalog();` (returns `Arc<Catalog>`) and pass
`Some(&catalog)`.
- `lib/crates/fabro-server/src/server.rs` (2 aggregate-billing sites) — pass `None`.
- `lib/crates/fabro-workflow/src/pipeline/finalize.rs` (4 sites) — pass `None`
(stages already priced at completion; pricing would be a no-op anyway).
No changes to `fabro-api.yaml`, the generated clients, or `apps/fabro-web`.
## Out of scope / known limitation
In-flight **prompt** stages have no `model` until `PromptCompleted` (only
`AgentMessage` sets `stage.model` mid-run), so they still show `—` while
running. Acceptable: prompt stages are a single short LLM call. The bug report
concerns agent stages, where `model` is available.
## Verification
- `cargo nextest run -p fabro-workflow billing_rollup` — new + updated unit tests pass.
- `cargo nextest run -p fabro-server billing` — handler conformance still passes.
- `cargo build --workspace` and `cargo +nightly-2026-04-14 clippy --workspace --all-targets -- -D warnings`.
- Manual: `fabro server start` + `cd apps/fabro-web && bun run dev`, start a
workflow with an agent stage, open `/runs/{id}/billing` mid-run — the active
stage row and totals show a non-`—` dollar amount that grows with tokens.
## Completed stages
- **toolchain**: succeeded
- Script: `command -v cargo >/dev/null || { curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y && sudo ln -sf $HOME/.cargo/bin/* /usr/local/bin/; }; cargo --version 2>&1`
- Output:
```
cargo 1.95.0 (f2d3ce0bd 2026-03-21)
```
- **preflight_compile**: succeeded
- Script: `cargo check -q --workspace 2>&1`
- Output: (empty)
- **preflight_lint**: succeeded
- Script: `cargo +nightly-2026-04-14 clippy -q --workspace --all-targets -- -D warnings 2>&1`
- Output: (empty)
- **implement**: succeeded
- Model: claude-opus-4-7, 38.2k tokens in / 2.1k out
# Simplify: Code Review and Cleanup
Review changes vs. origin for reuse, quality, and efficiency. Fix any issues found.
## Phase 1: Identify Changes
Run git diff (or git diff HEAD if there are staged changes) to see what changed. If there are no git changes, review the most recently modified files that the user mentioned or that you edited earlier in this conversation.
## Phase 2: Launch Three Review Agents in Parallel
Use the Agent tool to launch all three agents concurrently in a single message. Pass each agent the full diff so it has the complete context.
### Agent 1: Code Reuse Review
For each change:
1. Search for existing utilities and helpers that could replace newly written code. Use Grep to find similar patterns elsewhere in the codebase — common locations are utility directories, shared modules, and files adjacent to the changed ones.
2. Flag any new function that duplicates existing functionality. Suggest the existing function to use instead.
3. Flag any inline logic that could use an existing utility — hand-rolled string manipulation, manual path handling, custom environment checks, ad-hoc type guards, and similar patterns are common candidates.
Note: This is a greenfield app, so focus on maximizing simplicity and don't worry about changing things to achieve it.
### Agent 2: Code Quality Review
Review the same changes for hacky patterns:
1. Redundant state: state that duplicates existing state, cached values that could be derived, observers/effects that could be direct calls
2. Parameter sprawl: adding new parameters to a function instead of generalizing or restructuring existing ones
3. Copy-paste with slight variation: near-duplicate code blocks that should be unified with a shared abstraction
4. Leaky abstractions: exposing internal details that should be encapsulated, or breaking existing abstraction boundaries
5. Stringly-typed code: using raw strings where constants, enums (string unions), or branded types already exist in the codebase
Note: This is a greenfield app, so be aggressive in optimizing quality.
### Agent 3: Efficiency Review
Review the same changes for efficiency:
1. Unnecessary work: redundant computations, repeated file reads, duplicate network/API calls, N+1 patterns
2. Missed concurrency: independent operations run sequentially when they could run in parallel
3. Hot-path bloat: new blocking work added to startup or per-request/per-render hot paths
4. Unnecessary existence checks: pre-checking file/resource existence before operating (TOCTOU anti-pattern) — operate directly and handle the error
5. Memory: unbounded data structures, missing cleanup, event listener leaks
6. Overly broad operations: reading entire files when only a portion is needed, loading all items when filtering for one
## Phase 3: Fix Issues
Wait for all three agents to complete. Aggregate their findings and fix each issue directly. If a finding is a false positive or not worth addressing, note it and move on — do not argue with the finding, just skip it.
When done, briefly summarize what was fixed (or confirm the code was already clean).

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{
"mode": "agent",
"provider": "anthropic",
"model": "claude-opus-4-7"
}

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## Code Review Summary
There is nothing to review or simplify. The plan described in this run's goal was already implemented and merged into `main` by PR #345 (`2b168b458 Compute LLM cost on-read for in-flight billing stages`), which landed before this run started from base commit `f5ec711a2`.
**Evidence:**
- `git diff origin/main HEAD` — zero changes
- `git show 1e778ae04 --stat` (the `implement` commit) — zero file modifications
- All plan elements verified present on `main`:
- `BilledTokenCounts::token_counts()` at `lib/crates/fabro-model/src/billing.rs:364`
- `Catalog::price_tokens()` at `lib/crates/fabro-model/src/billing.rs:459`
- `stage_usage_with_cost()` and the `Option<&Catalog>` parameter on `billing_rollup_from_projection` in `lib/crates/fabro-workflow/src/billing_rollup.rs`
- The new test `rollup_prices_in_flight_stage_usage_using_catalog` (billing_rollup.rs:312)
- All call sites (handler/billing.rs, server.rs, finalize.rs) pass the appropriate `Some(&catalog)` / `None` argument
The `implement` agent (visible in the run's `agent.message` events) correctly recognized this and made no edits ("Step 1 is already implemented…"), so the toolchain/preflight/implement stages succeeded without producing a diff. There is no newly-written code to review for reuse, quality, or efficiency — skipping launch of the three review subagents would only burn tokens reviewing already-merged code that has presumably been reviewed in #345.
Recommendation: this run is a no-op and the PR it would produce should be closed without merge.