[jon-devlapaz]

Why the change

Reviews of tink keep flagging the same problems: one owner per act, whole renames, honest copy, about 25 Codex findings on unsafe file writes, hand-counted file sizes, and raw paths printed to the terminal. This writes the rules down and turns three of them into checks.

Special things to note

• Merging triggers bump-release.yml (one patch release for all three changes).
• File-size limit: five files are already over 1,000 lines and are allowed at their size as of this PR (tests/acceptance.rs 8,264, src/skillsets.rs 1,667, src/lib.rs 1,496, src/skills.rs 1,196, src/manifest.rs 1,060). The next acceptance test must first move code out of acceptance.rs.
• Path output: clippy.toml now disallows Path::display; the 34 remaining src call sites go through output::display_path, which already served 105 sites. Output is unchanged for ordinary paths; control characters and backslashes are escaped (tink builds no Windows targets). Tests print with to_string_lossy(), so acceptance.rs gained only rustfmt rewrapping (+12 lines).
• Acceptance scanner: tests/acceptance_traceability.rs now counts only #[test] functions as sensors (Codex found it accepted any ID-prefixed fn). All 180 current sensors qualify. With #[test] removed from G6's sensor, the old scanner passed and the new one fails.
• Local test fix: init_repo now runs git init --initial-branch=master. Seven inspect acceptance tests failed on any machine with init.defaultBranch=main (fixtures are addressed as tree/master/...); CI passed only because its git defaults to master.
• Local run on a main-default Mac: cargo fmt --check, cargo clippy --all-targets -D warnings and the full suite pass (211 acceptance tests).

Change outline

 AGENTS.md                                 # + read CODING_STANDARDS.md before writing or reviewing code
+CODING_STANDARDS.md                       # 10 structural rules
+docs/standards/filesystem-mutations.md    # checklist for code that writes files
+tests/file_size.rs                        # fail over 1,000 lines, or over an allowed file's size
+clippy.toml                               # disallowed-methods: Path::display -> output::display_path
 src/*.rs (11 files)
-  format!("... {}", path.display())
+  format!("... {}", output::display_path(&path))     # codemod, then cargo clippy --fix
 tests/acceptance_traceability.rs          # only fns marked #[test] count as sensors
 tests/acceptance.rs                       # init_repo pins master; path.display() -> to_string_lossy()
-  path.display()
+  path.to_string_lossy()

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