[aruintelligence]

Change

• Reproduce and close the Python verifier gap for signed receipt numbers such as 1e-7, using JavaScript-compatible fixed and exponent rendering within an explicit finite, safe-magnitude subset.
• Add six signed numeric receipt cases, tamper rejection, and an explicit unsafe-integer rejection; upload the compact capsule comparison from CI.
• Capture a real locked HTTP response containing 1e-7 and verify it in Python against the host-owned intent, nonce, signature pin, and decision. Challenge a changed host expectation.
• Document the supported subset and remaining key/string serialization limits without changing JavaScript capsule bytes.

Local evidence

• npm test: 797 passed.
• node scripts/check-evidence-capsule-python.mjs: 17 cases passed.
• node scripts/check-http-exchange-python.mjs: 24 cases passed.
• Archive, migration, shard, drill, repair and placement Python cross-runtime checks passed.
• npm run api:stability, npm run upgrade:check, npm run check:links, git diff --check passed.
• 26,385 finite numeric samples compared against JSON.stringify with zero observed mismatches (exploratory sample, not a completeness claim).

Project-authored interoperability checks do not establish independent certification or production suitability.