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2 commits

Author SHA1 Message Date
Bryan Helmkamp
5b5e0d83fd
fix: render Ask Fabro session responses
Handle the flattened session SSE event envelopes emitted by the API so assistant deltas are applied to the Ask Fabro runtime instead of being ignored.
2026-05-22 12:32:59 -04:00
fabro-sh-0530[bot]
95b45b5960
feat: wire Ask Fabro sidebar to real session API with run-control tools (#349)
## Summary

Ships the Ask Fabro sidebar on run pages end-to-end: the agent now has
live `fabro_run_interact` and `fabro_run_events` tools scoped to its
owning run, and the web sidebar talks to real session APIs instead of a
scripted adapter. The `?ask=1` prototype gate is dropped in favour of
server-reported `run.ask_fabro.available`.

## What changed and why

### Rust — run-control tools in Ask Fabro sessions (`fabro-server`,
`fabro-workflow`, `fabro-tool`)

**Tool registration** (`fabro-workflow`): `register_fabro_run_tools` is
now `pub`; a new `register_named_fabro_run_tools` variant accepts a name
allowlist so callers can register a subset without forking the catalog
loop. Unknown names are silently ignored.

**Run-scoped backend** (`fabro-tool`): `ClientBackend` gains a
`run_scope: Option<RunId>` field set via `.with_run_scope(run_id)`.
Every method checks the scope before delegating to the HTTP client,
returning an error before a network call is made. `list_store_runs`
returns a single-element vec of the owning run when scoped;
`resolve_run` rejects non-parseable selectors rather than forwarding
them.

**Session wiring** (`fabro-server`): `build_profile` now returns
`Box<dyn AgentProfile>` (mutably accessible) instead of `Arc`;
`build_agent_session` mints a same-run worker token, builds a
`ClientBackend::with_run_scope`, constructs `FabroRunToolServices`, and
calls `register_named_fabro_run_tools` for the two tools before freezing
into an `Arc`. `AppState::self_server_target()` reads the bound address
from the runtime daemon record for the loopback HTTP call.

**Approval gate**: `build_ask_fabro_tool_approval` now fast-paths
`fabro_run_interact` and `fabro_run_events` to `Ok(())`; all other tools
remain subject to the `ReadOnly` auto-approve check. File/shell tools
are still denied.

### Web — real session adapter and sidebar wiring (`fabro-web`)

**`ask-fabro-runtime.ts`** (new): a `ChatModelAdapter` that creates a
session lazily on the first turn (`sessionsApi.createRunSession`),
caches the session id in `sessionStorage` keyed by run id, and streams
turns via `streamSessionTurn`. `applyTurnEvent` maps `run.session.*` SSE
events to assistant-ui `ThreadAssistantMessagePart[]` incrementally
(text deltas, tool-call started/completed pairs). A 404 on stream clears
the cached id so the next turn starts fresh.

**`ask-fabro-sidebar.tsx`**: drops `scriptIndexRef`, `EMPTY_CHAT`, and
the scripted adapter import; accepts `runId` and `defaultModel` props;
constructs the real adapter via `createAskFabroAdapter`.

**`run-detail.tsx`**: removes `?ask=1` / `askEnabled`; reads
`run.ask_fabro.{available, default_model}` from the summary; always
renders an `AskFabroTriggerButton` (disabled with a tooltip when
unavailable); passes `runId` and `defaultModel` to `<AskFabroSidebar>`.

### Architecture

```mermaid
graph TB
    Browser -->|SSE turn stream| SessionsHandler
    SessionsHandler -->|spawn| AskFabroAgent
    AskFabroAgent -->|fabro_run_interact\nfabro_run_events| ClientBackend
    ClientBackend -->|HTTP + same-run\nworker token| RunsAPI[Runs API\n/runs/:id]
    ClientBackend -->|run_scope check| ClientBackend
    RunsAPI -->|403 cross-run| ClientBackend
```

### Design decisions

- **Same-run scoping is double-enforced**: the `ClientBackend` scope
check fires before the HTTP call; the worker token's run scope causes a
403 at the API layer if the check were somehow bypassed.
- **`build_profile` → `Box` not `Arc`**: the profile needs mutable
access for tool registration after construction, so the `Arc` wrapping
is deferred until registration is complete.
- **`sessionStorage` per-run**: one session is reused across sidebar
open/close cycles for the same run tab; a page reload or different run
always starts clean.
- **Mutating actions included**: `interact` exposes
start/cancel/steer/archive/answer. This is intentional per the locked
decisions; the worker-token scope prevents cross-run blast radius.


### Fabro Details

<details>
<summary>Ran 9 stages in 74m 52s for $44.11</summary>

| Stage | Duration | Cost | Retries |
|---|---|---|---|
| start | 0s | – | 0 |
| toolchain | 1s | – | 0 |
| preflight_compile | 2m 11s | – | 0 |
| preflight_lint | 2m 22s | – | 0 |
| implement | 38m 37s | $32.02 | 0 |
| simplify_opus | 17m 40s | $6.55 | 0 |
| simplify_gpt | 9m 32s | $5.55 | 0 |
| verify | 3m 43s | – | 0 |
| fmt | 3s | – | 0 |
| **Total** | **74m 52s** | **$44.11** | **0** |

</details>

<details>
<summary>Ran <code>ImplementPlan.fabro</code> (12 nodes and 15
edges)</summary>

```dot
digraph ImplementPlan {
    graph [
        goal="Implement and simplify",
        model_stylesheet="
            * { model: claude-opus-4-7; }
        "
    ]
    rankdir=LR

    start [shape=Mdiamond, label="Start"]
    exit  [shape=Msquare, label="Exit"]

    toolchain         [label="Toolchain", shape=parallelogram, 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", max_retries=0]
    preflight_compile [label="Preflight Compile", shape=parallelogram, script="cargo check -q --workspace 2>&1", max_retries=0]
    preflight_lint    [label="Preflight Lint", shape=parallelogram, script="cargo +nightly-2026-04-14 clippy -q --workspace --all-targets -- -D warnings 2>&1", max_retries=0]
    fix_lints         [label="Fix Lints", prompt="The preflight lint step failed. Read the build output from context and fix all clippy lint warnings.", max_visits=3]
    implement         [label="Implement", prompt="Read the plan file referenced in the goal and implement every step. Make all the code changes described in the plan. Use red/green TDD."]
    simplify_opus     [label="Simplify (Opus)", prompt="@prompts/simplify.md"]
    simplify_gpt      [label="Simplify (GPT-55)", prompt="@prompts/simplify.md", model="gpt-55"]
    verify            [label="Verify", shape=parallelogram, script="cargo +nightly-2026-04-14 clippy -q --workspace --all-targets -- -D warnings 2>&1 && cargo nextest run --cargo-quiet --workspace --status-level fail 2>&1 && cargo dev docs refresh 2>&1 && cargo dev docs check 2>&1", goal_gate=true, retry_target="fixup"]
    fixup             [label="Fixup", prompt="The verify step failed. Read the build output from context and fix all clippy lint warnings, test failures, and generated docs errors.", max_visits=3]
    fmt               [label="Format", shape=parallelogram, script="cargo +nightly-2026-04-14 fmt --all 2>&1", max_retries=0]

    start -> toolchain
    toolchain -> preflight_compile [condition="outcome=succeeded"]
    toolchain -> exit
    preflight_compile -> preflight_lint [condition="outcome=succeeded"]
    preflight_compile -> exit
    preflight_lint -> implement [condition="outcome=succeeded"]
    preflight_lint -> fix_lints
    fix_lints -> preflight_lint
    implement -> simplify_opus -> simplify_gpt -> verify
    verify -> fmt   [condition="outcome=succeeded"]
    verify -> fixup
    fixup -> verify
    fmt -> exit
}

```

</details>

⚒️ Generated with [Fabro](https://fabro.sh)

---------

Co-authored-by: Bryan Helmkamp <bryan@brynary.com>
Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Co-authored-by: Fabro <noreply@fabro.sh>
Co-authored-by: fabro <fabro@example.com>
Co-authored-by: fabro <fabro@fabro.sh>
2026-05-22 09:43:31 -04:00