[SFenton]

Summary

• promote the tested native background-agent tandem skill with GPT-6 Sol max/default and Opus 5.5 high/default, with an immediate dispatch/yield boundary
• restore normal CLI edit/shell permissions for explicitly authorized implementation; keep Opus read-only and release/live-system gates unchanged
• install only tandem and core safety; retire recognized global budget skill/instructions/hooks with an exact rollback receipt

Validation

• changed test files: node --test tests/install.test.mjs tests/minimal-policy.test.mjs (13 passed)
• npm test (233 passed, 13 skipped)
• npm run test:skills (74 passed)
• scratch migration/rollback against copies of current global files and synthetic apply_patch edit succeeded

[SFenton]

CI note: shared Ubuntu, macOS, and Windows suites passed. The projects integration job failed on the same four external policy-drift tests already failing on merged main (run 35780576124): project learning policies, canonical max/long inventory site, relocated contract hooks, and registered-worktree scan. None is introduced by this PR. main has no required branch-protection checks.