The traceability tool scans `tools/`, which is its own source, and a line was taken for a tag whenever `TRACES:` appeared anywhere on it. Its unit-test fixtures are therefore tags. R1 — cross-platform output within a bounded tolerance, the requirement with no acceptance criterion at all — was reported implemented on the strength of two string literals in `context_looks_forward_then_backward`. R1 was only the visible case because it had no other coverage. The same fixtures also contributed sites to FR-CAT-1, FR-CAT-2 and NFR-P1, `gestures.rs` contributed one to FR-UI-4 from a `push_str`, and `dr-pipeline/build.rs` contributed FR-DEV-3a and FR-DEV-3c from the tag it *emits* into generated code. Those four requirements keep real tags elsewhere, so nothing but noise is lost by dropping them. The rule is about position, not about string literals. It cannot be about string literals: `schema.rs` writes six genuine tags inside Rust string literals, because the SQL it embeds is commented with `--`, and an extractor that refused those would lose more than it saved. What separates the two is where on the line the tag is. A tag written to be read is the first word of its comment; a tag quoted inside an expression never is. So `tag_body` asks for a comment opener at the start of the line and `TRACES:` immediately after it. That closes every shape but one: a multi-line literal whose lines really do begin with `///`, which no line-oriented reader can tell from source. There is one such fixture and its ids are now UT and IT, which `is_requirement` already excludes from coverage — the mechanism existed and was simply never used on the tool itself. `this_crates_own_fixtures_cannot_reach_the_register` enforces that: any requirement id below `mod tests` in this crate fails the test and says to use a UT- or IT- id instead. Tagging the tool's real code is still allowed. On `SOURCE_SUFFIXES`, which cannot reach `AndroidManifest.xml`, the Flatpak manifest, the Dockerfile or the CI workflows: it is deliberately left alone, and the reasoning is recorded beside it. A tag on a manifest asserts that a comment exists next to a line nothing checks, which is the weak form CONTRIBUTING.md warns about. The convention already in the tree — a Rust test that `include_str!`s the file and asserts what must be in it, with the tag on the test — is what a tag is supposed to mean. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
DarkRoom
A cross-platform, non-destructive RAW photo editor for Linux and Android.
Status: 0.9.0, and no longer a spike. A library opens, culls, develops and exports on both platforms, across eight tagged releases. What is not built is written down rather than merely absent — see docs/outstanding.md for the requirements that have no implementation and why, and docs/technical-debt.md for the compromises that were chosen.
Documentation
| Document | Contents |
|---|---|
| CONTRIBUTING.md | How to land a first change without reading the rest |
| requirements.md | What the software must do — 179 numbered requirements |
| architecture.md | How it is built — crates, GPU pipeline, data model, sync |
| technical-debt.md | Compromises taken deliberately, each with the condition that retires it |
| outstanding.md | What is not built, and whether that is a decision or a gap |
| code-health.md | What a contribution costs, per seam, measured |
| traceability.md | Generated: which requirement is claimed by which file |
| faces.md | Face detection and identity — the models, the licence problem, and what S14 measured |
Building
Desktop:
cargo run -p darkroom-desktop
Android (containerised toolchain, see docker/android):
./docker/android/build.sh cargo ndk -t arm64-v8a build --release
Git LFS is required for the model weights, and the toolchain pins itself. CONTRIBUTING.md has the details and the four commands CI will run against what you send.
Current state
Working. A catalog over a local folder, a Nextcloud account, or a folder a
sync client keeps in virtual-files mode — where a placeholder is treated as the
photograph rather than as a one-byte file. A virtualised library grid with a
capture-time timeline, ratings, labels, keywords, collections and a trash that
survives a crash mid-operation. Card ingest. Face detection and identity, with
the index syncing between devices. A develop pipeline of fifteen declared
operations fused into a single compute dispatch, plus the neighbourhood
operations that cannot be — clarity, texture, capture sharpening, noise
reduction, lens correction, spectral film simulation. Crop, straighten, spot
removal, gradient and subject-segmentation masks, named presets, and a
generated panel that no operation in ui/ is allowed to name. Export to JPEG,
PNG and 8- or 16-bit TIFF with resize and output sharpening.
The zero-copy display path works on desktop. The compute pass writes a texture that Slint composites directly, which is what ARCH §6.1 requires; the readback it forbids costs 96% of frame time at 4K, and
cargo run -p dr-gpu --example bench --features readback
still reproduces that measurement. The one exception is the Android develop view, which reads the frame back through the CPU because zero-copy there needs wgpu's Vulkan swapchain, and that tears a portrait window on a tablet whose panel is mounted landscape. It is debt, not a revision of the rule: the reasoning, the on-device measurements that forced it, and the three separate things any one of which would remove it are in technical-debt.md TD-1.
Not built. Plugins, compare and survey culling, focus peaking, burst grouping, AI denoise, tiled and progressive rendering, and most of the Android platform integration beyond running. The performance targets in §4.1 are unverified rather than unmet — the per-commit benchmark suite §8 requires does not exist, so nothing fails a build on a regression. docs/outstanding.md is the list, with the reasoning.
Licence
GPL-3.0-or-later.