wai identify: what any file is, from its bytes alone #589
2026-11-03
wai mcp: media_inspect is in the core toolset's list
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The core toolset serves media_inspect after envelope_inspect; tests/cli_mcp.rs and the README's toolset table now name it in that place. Co-Authored-By: Claude Opus 5.5 <[email protected]>
2026-11-02
int_kernels_vectors: the identify corpus decodes nothing
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every_decoded_output_states_a_sha256 requires each conformance directory to state its decoded outputs' SHA-256 or say why it has none. identify-conformance decodes nothing: each vector states what a file's bytes are read as, and the file's SHA-256 in vectors.json. Co-Authored-By: Claude Opus 5.5 <[email protected]>
wai identify: what any file is, from its bytes alone
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WAI HTTP delivery / HTTP corpus · every patch and mutation in exactly one shard (pull_request) Successful in 38s
wai-ops-gpu integer operators on GPUs / builds · no adapter is not a pass (linux) (pull_request) Successful in 4m29s
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WAI HTTP delivery / HTTP corpus · verified both ways, and the differential (pull_request) Successful in 3m18s
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WAI energy receipts / energy receipts · linux (pull_request) Successful in 17m38s
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wai-sink-android native sink library / the JNI layer and the platform-free half on the host JVM · linux-arm64 (pull_request) Successful in 2m38s
wai-pack / wai-pack · independent verifier (Python) (pull_request) Successful in 7m11s
wai-quantum studio and desktop / desktop app · linux (pull_request) Successful in 5m19s
WAI Studio / the catalogue's actions, the unit tests and the core · linux (pull_request) Successful in 54s
wai-sink-android native sink library / every ABI, the AAR, and the instrumented tests in a headless emulator · macos (pull_request) Successful in 8m1s
wai-quantum docs, course and locales / every command and snippet in the docs · linux (pull_request) Successful in 23m0s
WAI Studio / Studio in Chromium and Firefox · macos (pull_request) Successful in 11m28s
wai-web wasm32 / wai-web wasm32 build · corpus, menu and writers (pull_request) Successful in 7m39s
WAI Studio / Studio in WebKit · linux (pull_request) Has been cancelled
wai-sink-swift native sink package / libwai slices, desktop tests, simulator tests · macos (pull_request) Has been cancelled
WAI conformance / independent verifiers · claims, JWP, key discovery and integer payloads (Python) (pull_request) Has been cancelled
`wai inspect` reads envelopes; most files a toolchain meets are not envelopes, and the first question about one is what it is. `wai identify <file>` (operation media.inspect, extensions/media-identify.md) answers it for any file: - the formats the bytes fit, each with the offsets of the bytes that say so, how far its structure was followed and where and why that stopped; - a container's tracks as it states them: codec, size, channels, rate, protection; - the registered capabilities they map to, and what a format probe reads of them; - signatures found inside the file; - where no format is recognised, measures that still hold: how the byte values are spread, uniform windows, and the lags at which the bytes repeat. The verdict is identified, ambiguous, signature_only or unknown, and there is no confidence figure: a candidate's strength says what was checked. Nothing is decoded, no protected track is opened, and unknown stays unknown. Walks cover ISO media, Matroska, transport streams, Ogg, FLAC, RIFF, MPEG audio, ADTS, PNG, JPEG, GIF, IVF, YUV4MPEG2, FLV, AV1 OBU and Annex B streams, and HLS and DASH text; 35 more formats are known by their signature. Every walk is bounded, reads a file where its lengths lead (a large file is never held whole), and has been given hostile bytes; it builds for wasm32. The agent door has it as media_inspect, its results marked untrusted_content: a file's author chooses the strings in it. identify-conformance/ holds files written by real muxers and encoders from test patterns and tones, what an independent media prober reads of them (prober.json), and generated cases sitting on each rule's edge. identify_verify.py is a second implementation written from the text; it reads the extension's tables, gives every file its whole result, and holds ext/ to the prober's reading. tests/identify.rs holds the reference's tables to the extension's. Co-Authored-By: Claude Opus 5.5 <[email protected]>