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nodes/implement/prompt.md

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+Goal: # Plan: Merge fabro-linear and GitHub tracker into fabro-tracker
+
+## Context
+
+The tracker ecosystem currently has three crates:
+- **fabro-tracker** — trait-only (57 lines): `Tracker` trait, `Issue`, `BlockerRef`
+- **fabro-linear** — standalone Linear functions that duplicate the `Issue`/`BlockerRef` types and don't implement the `Tracker` trait. Entirely unused.
+- **fabro-github** — mixed crate: GitHub App auth/PRs/branches (~70%) + `GitHubTracker` implementing `Tracker` (~30%). The `GitHubTracker` is also unused by consumers.
+
+Goal: consolidate both tracker implementations into `fabro-tracker`, keeping non-tracker GitHub code in `fabro-github`, and deleting `fabro-linear`.
+
+## Dependency Direction Change
+
+**Current:** `fabro-github → fabro-tracker` (for trait re-export)
+**After:** `fabro-tracker → fabro-github` (for auth primitives: `GitHubAppCredentials`, `sign_app_jwt`, `create_installation_access_token_for_projects`)
+
+`fabro-github` no longer depends on `fabro-tracker`. No circular dependency.
+
+## Steps
+
+### 1. Update `lib/crates/fabro-tracker/Cargo.toml`
+
+Add dependencies needed by both implementations:
+```toml
+[dependencies]
+fabro-github = { path = "../fabro-github" }
+async-trait.workspace = true
+serde.workspace = true
+serde_json.workspace = true
+reqwest.workspace = true
+tracing.workspace = true
+tokio = { workspace = true }
+
+[dev-dependencies]
+mockito = "1"
+tokio = { workspace = true, features = ["test-util", "macros"] }
+```
+
+### 2. Update `lib/crates/fabro-github/Cargo.toml`
+
+Remove:
+- `fabro-tracker = { path = "../fabro-tracker" }`
+- `async-trait.workspace = true`
+
+### 3. Remove tracker code from `lib/crates/fabro-github/src/lib.rs`
+
+Remove these items (keep everything else):
+- `use async_trait::async_trait;` (line 1)
+- `use tokio::sync::OnceCell;` (line 3)
+- `pub use fabro_tracker::{BlockerRef, Issue, Tracker};` (line 5)
+- `execute_github_graphql()` fn (~line 796)
+- `GitHubTracker` struct, `impl GitHubTracker`, `impl Tracker for GitHubTracker` (~line 866-1315)
+- `normalize_github_item()` fn (~line 981)
+- `fetch_project_items_page()` fn (~line 1035)
+- All tracker-related tests (~line 2172-2841): `execute_github_graphql` tests, tracker helpers (`mock_github_tracker`, `make_test_issue`, etc.), and all `GitHubTracker` method tests
+
+**Keep** `create_installation_access_token_for_projects()` — it stays in fabro-github as a public function alongside the other `create_installation_access_token_*` variants.
+
+### 4. Create `lib/crates/fabro-tracker/src/linear.rs`
+
+Adapt `fabro-linear/src/lib.rs` code:
+- **Remove** the duplicate `Issue` and `BlockerRef` struct definitions — use `crate::Issue` and `crate::BlockerRef`
+- **Adapt** `normalize_issue()` to return `crate::Issue` with `project_item_id: None`
+- **Create** `LinearTracker` struct wrapping `LinearConfig`, `reqwest::Client`, and `project_slug: String`
+- **Implement** `Tracker for LinearTracker` by delegating to the existing functions
+- **Keep** private: `execute_graphql`, `normalize_issue`, `extract_issues`, `ISSUE_FIELDS`, `BLOCKS_RELATION_TYPE`
+- **Keep** public: `LinearConfig`, `LinearTracker`, `LINEAR_API_ENDPOINT`
+- **Move** all tests, updating assertions for the added `project_item_id` field
+
+### 5. Create `lib/crates/fabro-tracker/src/github.rs`
+
+Move tracker code from fabro-github:
+- Import from fabro-github: `GitHubAppCredentials`, `sign_app_jwt`, `create_installation_access_token_for_projects`
+- Contains: `GitHubTracker` struct + impls, `execute_github_graphql`, `normalize_github_item`, `fetch_project_items_page`
+- Uses `crate::Issue` and `crate::BlockerRef` (same types, just different import path)
+- Move all GitHubTracker tests (duplicate `test_rsa_key()` helper since test code isn't importable across crates)
+
+### 6. Update `lib/crates/fabro-tracker/src/lib.rs`
+
+Add module declarations and re-exports:
+```rust
+pub mod github;
+pub mod linear;
+
+pub use github::GitHubTracker;
+pub use linear::{LinearConfig, LinearTracker, LINEAR_API_ENDPOINT};
+```
+
+### 7. Delete `lib/crates/fabro-linear/`
+
+Remove entire directory. Workspace glob `members = ["lib/crates/*"]` handles the rest.
+
+## Verification
+
+```bash
+cargo build --workspace
+cargo test --workspace
+cargo clippy --workspace -- -D warnings
+cargo fmt --check --all
+```
+
+Key things to verify:
+- No circular dependency (fabro-tracker → fabro-github, fabro-github has no fabro-tracker dep)
+- Linear `normalize_issue` sets `project_item_id: None`
+- All moved tests pass in their new home
+- `test_rsa_key()` helper is duplicated in fabro-tracker's github test module
+
+
+## Completed stages
+- **toolchain**: success
+  - 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`
+  - Stdout:
+    ```
+    cargo 1.94.0 (85eff7c80 2026-01-15)
+    ```
+  - Stderr: (empty)
+- **preflight_compile**: success
+  - Script: `cargo check -q --workspace 2>&1`
+  - Stdout: (empty)
+  - Stderr: (empty)
+- **preflight_lint**: success
+  - Script: `cargo clippy -q --workspace -- -D warnings 2>&1`
+  - Stdout: (empty)
+  - Stderr: (empty)
+
+
+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.

nodes/implement/provider_used.json

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+{
+  "mode": "agent",
+  "provider": "anthropic",
+  "model": "claude-opus-4-6"
+}

nodes/implement/response.md

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+Here's a summary of all changes made:
+
+## Summary of Changes
+
+### 1. `lib/crates/fabro-tracker/Cargo.toml` — Updated dependencies
+Added `fabro-github`, `serde`, `serde_json`, `reqwest`, `tracing`, `tokio` as dependencies, and `mockito`/`tokio` as dev-dependencies to support both tracker implementations.
+
+### 2. `lib/crates/fabro-tracker/src/lib.rs` — Added module declarations and re-exports
+Added `pub mod github;`, `pub mod linear;`, and re-exports: `GitHubTracker`, `LinearConfig`, `LinearTracker`, `LINEAR_API_ENDPOINT`.
+
+### 3. `lib/crates/fabro-tracker/src/github.rs` — New file (moved from fabro-github)
+Contains `GitHubTracker` struct + impl, `execute_github_graphql`, `normalize_github_item`, `fetch_project_items_page`, and all GitHub tracker tests. Imports auth primitives from `fabro_github` and types from `crate::`.
+
+### 4. `lib/crates/fabro-tracker/src/linear.rs` — New file (adapted from fabro-linear)
+Contains `LinearTracker` struct implementing `Tracker` trait, `LinearConfig`, all Linear API functions, and all tests. Uses `crate::{BlockerRef, Issue}` instead of duplicate struct definitions. `normalize_issue` now sets `project_item_id: None`.
+
+### 5. `lib/crates/fabro-github/Cargo.toml` — Removed tracker dependencies
+Removed `fabro-tracker` and `async-trait` dependencies.
+
+### 6. `lib/crates/fabro-github/src/lib.rs` — Removed tracker code
+Removed: `use async_trait`, `use tokio::sync::OnceCell`, `pub use fabro_tracker::*`, `execute_github_graphql`, `GitHubTracker` struct/impls, `normalize_github_item`, `fetch_project_items_page`, and all tracker-related tests. Kept `create_installation_access_token_for_projects` and all non-tracker code.
+
+### 7. Deleted `lib/crates/fabro-linear/` — Entire directory removed
+Workspace glob `members = ["lib/crates/*"]` handles the workspace membership automatically.
+
+### Dependency direction change
+- **Before:** `fabro-github → fabro-tracker` 
+- **After:** `fabro-tracker → fabro-github` (no circular dependency)

nodes/implement/status.json

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+{
+  "status": "success",
+  "notes": "Stage completed: implement",
+  "failure_reason": null,
+  "timestamp": "2026-03-20T00:20:08.715901+00:00"
+}