Grounding G6: §1.8 gate #97 emit-shim coherence consumer (#1982)

[briansrls]

Evaluator freeze — src/v3/compiler/src/test_runner.rs (R3 Bundle 4b)

N/A — not touched.

Summary

Lands method_template_projection_emit_shim_retirement_coherence as §1.8 ledger row #97 (Q-V2-Retirement-Boundary-Matrix / Gunbc #1982).

• Consumer: src/v3/compiler/tests/integration/method_template_projection_emit_shim_coherence_test.rs — src/v2/stage0/ directory present ⇒ pb_method_template_projection_dag_emit.rs + [[bin]] emit_method_template_projection in src/v3/compiler/Cargo.toml + src/bin/emit_method_template_projection.rs must remain ( autobins = false — the manifest [[bin]] row is the Cargo target fact per codex review). v2 absent ⇒ all three must be removed.
• Authority: Updates docs/r3-program-plan.md §1.5 / §1.7 / §1.8 (96→97 gates; 93→94 load-bearing) + G6 footnote + docs/r3-structure.md Acceptance (R2-Grounding-Rust emit-shim boundary).
• SG-0: Registers the integration test module + one EXPECTED_HAND_AUTHORED_TEST census path.

Not in this PR: actual deletion of pb_method_template_projection_dag_emit — still required while src/v2/ stands (blocked on PB workspace removal).

Follow-up (codex BLOCKING): d8a8cf0 — gate #97 now rats the [[bin]] entry, not only the bin source path.

Per-PR dissolution gate (required for new/expanded hand-Rust under v3/)

• Exactly one disposition (3) — Lane Grounding G6 emit-shim retirement worker scope + cited dispatch Gunbc issue #1982 (§1.8 coherence consumer landed here; terminal shim deletion follows PB v2 tree removal).

SG-0 net-shrink discipline

SG-0 hand-path delta: +1

SG-0 pairing: (c) structural deferral + named Grounding dispatch Gunbc #1982

Per-PR debt-paydown receipt

• Exactly one disposition (3) No tracked ROADMAP debt rows retired by this slice (coordination-only progress on ROADMAP.md Method-template consumer migration bullet — substantive Gap-4 code deletion still sequenced behind PB v2_directory_deleted).

Test plan

• cargo test -p v3-compiler method_template_projection_emit_shim_retirement_coherence
• cargo test -p v3-compiler sg0_v3_hand_authored_census
• cargo fmt --all --check
• cargo clippy -p v3-compiler --all-targets -- -D warnings

  

[briansrls]

Review metadata

• Provider / model: codex / unknown
• Commit: 2a9f83e2 · Trigger: schedule
• Thinking: 170s wall

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BLOCKING (1)

Root Cause

• src/v3/compiler/tests/integration/method_template_projection_emit_shim_coherence_test.rs The gate models the bin as a file-path fact instead of the Cargo target fact → assert the emit_method_template_projection [[bin]] entry in src/v3/compiler/Cargo.toml tracks v2 alongside the source path.

⚠️ Gate #97's consumer is narrower than the coherence claim it marks CONSUMER_LANDED + PASSING.

[briansrls]

BLOCKING: Gate #97 claims the Cargo bin remains, but the consumer only checks the source file; with autobins = false, removing the [[bin]] entry while v2 remains would still pass, violating P2 boundary discipline.