every.channel: sanitized baseline

evolution/proposals/ECP-0020-determinism-moq-selftest.md

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+# ECP-0020: deterministic encode checks + MoQ self-test CLI
+
+## Status
+Draft
+
+## Context
+We need a repeatable way to validate deterministic encoding and to verify MoQ publish/subscribe flows from the CLI without the UI.
+
+## Decision
+Add CLI tooling for (1) deterministic re-encoding checks using the libx264 single-thread profile, and (2) a local MoQ round-trip self-test that compares object hashes.
+
+## Details
+- `ec-cli determinism-test` re-encodes the same input multiple times using `deterministic_h264_profile` and compares segment hashes.
+- `ec-node moq-selftest` publishes a chunked stream and subscribes to it using a second endpoint, verifying object hashes per chunk index.
+- The self-test waits for the subscriber to acknowledge each published chunk to avoid MoQ track drops, and waits briefly for endpoint addresses to appear.
+- Defaults are conservative: single-thread x264, bitexact flags, fixed GOP.
+
+## Consequences
+- Determinism regressions are detectable early.
+- MoQ path can be validated headlessly without the Tauri app.