feat: vendor permission system source

pi-permission-system/docs/retro/0060-bump-tsconfig-target.md

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+---
+issue: 60
+issue_title: "Investigate bumping tsconfig target/lib to ES2023+"
+---
+
+# Retro: #60 — Investigate bumping tsconfig target/lib to ES2023+
+
+## Final Retrospective (2026-05-04T22:16:00-04:00)
+
+### Session summary
+
+Clean execution across plan → build → ship.
+Bumped `tsconfig.json` target to ES2023, updated `AGENTS.md` constraints, and refactored `evaluate()` and `findCompiledWildcardMatch()` to use `findLast`.
+Released as v4.6.0 with no rework or corrections needed.
+
+### Observations
+
+#### What went well
+
+- Three-step plan mapped 1:1 to three clean commits with no deviations.
+- Existing 49 tests in the affected files (and full suite of 890) served as a reliable refactor harness — no new tests needed.
+- Biome pre-commit hook caught autoformat needs transparently; no manual intervention required.
+
+#### What caused friction (agent side)
+
+- None identified.
+
+#### What caused friction (user side)
+
+- None identified.