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pixelpass/tests/fixtures/ownership-tag-contract.txt
T
molluskandClaude Opus 5 1b01847c66 host/taint: match peerspeak's second ownership carrier
The consumer half of phase 1 (plan §5.1, impl plan §3). The engine's
tag root becomes a union: `peerspeak.owned` truthy OR `node.name`
starting with `peerspeak_owned_`. Round 8 added the second carrier
because a node property is invisible to the registry `global` event
and recoverable only by binding the node — which is exactly how the
phase-5 gate failed — while `node.name` is announced directly.

The union lives in `local_root_reason`, not in the adapter. Folding
both into the one `peerspeak_owned` bool at the observation boundary
would make each carrier untestable alone, which is the phase-3r
lesson: a gate asserting a value two sources can satisfy gates
neither. The existing `peerspeak_tagged_nodes_…` fixture now carries
both carriers, so it would keep passing if either were deleted; two
new tests pin them individually, and a third pins that the prefix
matches only at the start of a name.

Both literals are now named constants — they are a cross-repo wire
contract with peerspeak, not local naming — and asserted against
tests/fixtures/ownership-tag-contract.txt, committed byte-identical
in both repos. That test also runs the fixture's own worked example
name through the engine, so the shared file cannot document a value
this side does not actually exclude.

Five mutations verified: drop either carrier, loosen `starts_with` to
`contains`, or rename either constant, and exactly the intended test
fails.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
2026-07-25 19:19:39 -04:00

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# Screenshare audio exclusion — ownership tagging wire contract.
#
# peerspeak PRODUCES these carriers on every audio node it owns; pixelpass
# CONSUMES them as the primary taint root of the exclusion engine. Neither
# repo depends on the other, so this file is the contract: it is committed
# byte-identical in both, and each repo has a test that asserts its own named
# constants (and, on the producer side, the environment a real child Command
# would carry) match these values exactly.
#
# peerspeak/tests/fixtures/ownership-tag-contract.txt
# pixelpass/tests/fixtures/ownership-tag-contract.txt
#
# Pinned by peerspeak docs/screenshare-audio-exclusion-impl-plan.md §3 and
# docs/screenshare-audio-exclusion-plan.md §5.1 (v3.5). Changing a value here
# is a cross-repo breaking change: both repos must land in the same session,
# and the phase 5 matrix must be re-run.
#
# Two carriers, matched as a UNION — a node is peerspeak-owned if EITHER
# matches. Round 8 added the second because a property is invisible to the
# PipeWire registry `global` event and readable only via a node bind, so the
# primary taint root must not rest on one observation mechanism alone.
# Carrier 1 — a node property. The consumer treats any value other than
# "false"/"0" as truthy, which is the fail-closed direction; the producer
# always emits exactly this value.
prop_key=peerspeak.owned
prop_value=1
# Carrier 2 — a `node.name` prefix, announced by the registry without a bind.
# `node.description` is deliberately NOT touched, so mixers still show "mpv".
# Only the prefix is matched; the rest of the name is for diagnostics.
node_name_prefix=peerspeak_owned_
node_name_format=peerspeak_owned_<role>_<pid>
node_name_example=peerspeak_owned_mpv_31284