Unimem core boundary: PLAN evidence

Research and proposed implementation on Honeycrisp 9cbd48070a136e24711896c930670fcff8a147fc, with committed Strata 494df7a0973ae10a6cc1c2022e644d70449a29d6 supplying the existing dev dependency. Production remains unchanged. Fresh different-vendor PLAN review is pending at this frozen evidence epoch; no implementation approval is asserted.

The standalone own-panic-handler consumer fails E0152 because unimem depends on std. Existing owning tests pass but can re-enable std through reverse dev dependencies. An isolated consumer runs all 44 existing native integration tests without those edges. The proposed feature policy preserves default std queue behavior and exposes a no-default path; native frameworks, allocation/access contracts and physical-memory questions remain unchanged/open as recorded.

Research and PLAN name all gates and limitations. Parent records 03/06 show 53 owning tests + 13 doctests and 44 isolated native tests. Records 11/14/15 pass release workspace build, pipeline and bench execution. Workspace format, Clippy and test compilation remain red (09/10/12). Actual last tag v0.2.0 cannot resolve its historical NeBu path (16/17); compatibility, broader rung/product/dependent suites and Kelvin checks are unverified. Bench timings are raw execution evidence without a new performance guarantee. decision applies; no version, tag or publication is part of this source unit.

evidence.tar.gz retains the exact 184,360-byte readable PLAN packet, all 284 indexed support files, complete streams/receipts, source archives and checksummed primary dependency sources, proposed gate/templates, preparation history and verifier. manifest.json identifies the archive and review input. The full 168 registry archives and compiler outputs are omitted; their acquisition identities and workspace-lock checksums are retained. The 49 direct primary source bodies are present. No omitted support body is claimed to have been read by the reviewer.

Run nu verify.nu --output <fresh-result.json> from this directory. It hashes the archive, extracts into an isolated temporary directory, reconstructs the readable packet, checks source modes/blobs/bodies and streams, then removes that temporary directory. It uses Nu, Git hash-object and standard macOS tar/stat tools, without Ruby/Python. --git additionally compares tree membership with the original local Git repositories; the default replay verifies the archived identity chain. The actual initial replay with Git is preserved inside the capsule. New replays write only to the requested output and temporary directory.

The packet's initial preparation copy had literal newline escapes in its footer; the final packet replaces those two escapes with newline bytes. No source/evidence body changed; the earlier unsubmitted copy remains at /tmp/unimem-core-plan-preparation-v1. Nu setup failures and the Homebrew-versus- Rustup durable-gate distinction are retained explicitly in support/preparation.txt.