# AGENTS.md

## Repo layout
- `pipeline-runner/` — C++11 application built with PIP (Platform Independent Primitives).
- `pipeline-runner/src/main.cpp` — entry point, config loading, server start.
- `pipeline-runner/src/server.h/.cpp` — PIHTTPServer routes, all API endpoints.
- `pipeline-runner/src/pipeline.h/.cpp` — Pipeline/Prompt structs, JSON file I/O, log functions.
- `pipeline-runner/src/runner.h/.cpp` — async pipeline execution (PIThread + PIProcess per step).
- `pipeline-runner/src/messageutils.h/.cpp` — HTTP response helpers (JSON, error, success).
- `pipeline-runner/pipeline-runner.conf` — JSON config file (port, directories).
- `pipeline-runner/tests/` — gtest tests for pipeline storage and runner.
- `pipeline-runner/CMakeLists.txt` — CMake build config with PIP + gtest (FetchContent).
- `pipeline-runner/build.sh` — build + test script (incremental by default, `--rebuild` for clean).
- `pipeline-runner/storage/pipelines/` — JSON files for persisted pipelines.
- `pipeline-runner/storage/logs/` — execution logs (one file per run).

## Dev commands
- Build + test: `./pipeline-runner/build.sh` (incremental, auto-configures on first run).
- Clean build + test: `./pipeline-runner/build.sh --rebuild`.
- Build with FAKE mode: `./pipeline-runner/build.sh --rebuild --fake` (uses fake process executor, no opencode needed).
- Switching `--fake` on/off triggers a clean + reconfigure automatically.
- Run: `cd pipeline-runner/build && ./pipeline-runner ../pipeline-runner.conf`
- Test XML report: generated at `pipeline-runner/build/test-results.xml` after each test run.
- CMake uses `-S <src> -B <build>` and `cmake --build <build> -j$(nproc)` (no `cd build && make`).

## Build requirements
- **PIP library** must be installed system-wide (`find_package(PIP REQUIRED)`).
- gtest is fetched via custom mirror: `https://git.shstk.ru/mirrors/googletest.git` (v1.14.0).
- `CMAKE_EXPORT_COMPILE_COMMANDS ON` — `compile_commands.json` is generated in build dir for LSP.
- `CMakeLists.txt` uses `file(GLOB ...)` for sources — new `.cpp` files require re-running `cmake ..`.
- RPATH is set to `$ORIGIN;$ORIGIN/lib` so the binary finds PIP shared libs from its directory.

## Formatting
- Tabs (width 4), LF line endings, UTF-8 — enforced by `.editorconfig`.
- `.clang-format` column limit: 140. Use `clang-format -i` on changed files.

## API endpoints
| Method | Path | Description |
|--------|------|-------------|
| GET | `/api/pipelines` | List all pipelines |
| POST | `/api/pipelines` | Create pipeline (JSON body) |
| GET | `/api/pipelines/{id}` | Get single pipeline |
| DELETE | `/api/pipelines/{id}` | Delete pipeline |
| POST | `/api/runs` | Start execution (`{"pipeline_id": "..."}`) |
| GET | `/api/runs/{run_id}/status` | Poll run status + step results |
| GET | `/api/runs/{run_id}/log` | Get log file contents |

## Key behaviors
- C++11 standard — no modern C++ features (no `auto` return type deduction, no `std::optional`, etc.).
- All source code is in the **global namespace** (no namespace wrapping).
- Pipeline execution runs `opencode run <text> --title <title>` per step via `PIProcess` (not a shell).
- Each step has a **300-second timeout** (`proc.waitForFinish(PISystemTime::fromSeconds(300))`).
- Pipeline stops on first step error (non-zero return code).
- Each run executes in a separate `PIThread` (thread object is intentionally leaked; PIP manages lifetime).
- Run state is **in-memory only** — lost on server restart. Log files persist to disk.
- CORS headers are added to all responses (`Access-Control-Allow-Origin: *`).
- Config paths (`pipelines_dir`, `logs_dir`) are relative to the **process working directory**, not the binary path.
- Tests use `/tmp/pipeline-runner-test/` with manual setup/cleanup per test — **not isolated**, do not run in parallel.