mint pipeline drops method:strip_prefix producer bridge from final proof

[TSavo]

Summary

method:strip_prefix postconditions are emitted correctly by the kit-side RPC, but the producer bridge is absent from the final target proof. The two expected CLI closures therefore stay unproven even though the caller-side contracts and method:expect bridges are present.

Evidence

• Local kit RPC emits the method:strip_prefix producer bridge with argTerm = method:strip_prefix(digest,"blake3-512:") for the audited signer-seed sites.
• Decoded cold target proof contains caller contracts for deterministic_signer_seed with the expected panic loci:
  • cmd_emit.rs:531, producer line 530
  • cmd_mint.rs:2439, producer line 2438
• Decoded cold target proof contains synthetic contracts digest_strip_prefix__emit_signer_seed and digest_strip_prefix__mint_signer_seed with post = is_some(result).
• Decoded cold target proof contains the caller-side method:expect bridges at cmd_emit.rs:531 and cmd_mint.rs:2439.
• Decoded cold target proof does not contain the corresponding method:strip_prefix producer bridge.

Impact

The strip_prefix +2 closure is gated on a downstream mint/proof-inclusion or verifier bundle-scoping fix. The kit-side arg0_literal work was reverted because it has no working consumer until this bridge reaches the final proof.

Relates to #1901; this is the same producer-bridge-into-caller-bundle question in a smaller form.

[TSavo]

Infra note from the #1908 re-gate: the rustAnalyzerReady cold-gate failure was caused by a stale /home/tsavo/.local/bin/provekit-linkerd shadowing the fresh target/debug/provekit-linkerd in the self-check spawn PATH. The fresh target binary served rustAnalyzerReady on an isolated socket; the resident daemon from ~/.local/bin returned method not found.

Immediate unblock used PROVEKIT_LINKERD_BIN=/home/tsavo/remote/provekit-bcargo-d17ab89f79d4/provekit/implementations/rust/target/debug/provekit-linkerd for the cold gates. The stale ~/.local/bin/provekit-linkerd has been refreshed to the fresh build. Robust follow-up: make cold-gate/self-check harnesses pin PROVEKIT_LINKERD_BIN deterministically to the current build, independent of PATH.

[TSavo]

Bundle-index inspection from slice 33: the two deterministic_signer_seed panic loci are present (src/cmd_emit.rs:531 -> producer line 530, and src/cmd_mint.rs:2439 -> producer line 2438) and both carry producerSymbol=method:strip_prefix with argTerm=method:strip_prefix(digest, "blake3-512:").

The final caller bundle has the panic-leaf method:expect bridges at the panic lines, but no bridge member for sourceSymbol=method:strip_prefix; the required bridges_by_callsite keys (caller bundle, src/cmd_emit.rs, 530, method:strip_prefix) and (caller bundle, src/cmd_mint.rs, 2438, method:strip_prefix) are absent. body_discharge::callee_post_guard_fact requires exactly those callsite-scoped producer bridge keys for panic receiver guard discharge, so this is not kit-side achievable by manifest/lift changes alone. It needs mint/proof-pool/verifier bundle inclusion/scoping work; treating this as parked with the broader #1901 bundle-scoping dependency.