[spec-enforcer] Enforce specifications for colorwriter, console, constants

[github-actions]

Specification Test Enforcement

This PR updates specification-driven tests for the following packages:

Package	Tests Updated	Tests Passing	Spec Sections Covered
colorwriter	3	3	Public API, build variants
console	7	7	Public API, types, design decisions, thread safety
constants	6	6	Public API, types, constants, design decisions

Test Derivation

All tests are derived from current README.md specifications, not implementation behavior. Stale assertions for details no longer specified by the READMEs were removed, including the colorwriter implementation-import test.

Spec-Implementation Mismatches

• console.RenderStruct retains a zero-valued field tagged omitempty as a column rendered with -; the README says omitempty omits zero-valued fields. The suite records this as SPEC_MISMATCH without treating the current implementation as the contract.

Validation

• Package builds passed for all three packages.
• All 16 TestSpec functions passed.
• Final pre-PR validation passed formatting, lint, impacted unit tests, and workflow lock drift checks.
• A combined Cobertura report was generated, but this run did not provide the coverage-upload safe output.

Round-Robin State

• Run mode: round-robin
• Packages processed this run: colorwriter, console, constants
• Next packages in rotation: ctxutil, envutil, errorutil
• Total eligible packages: 37 (with README.md)

References: §37303507217

Generated by 📋 Package Specification Enforcer · codex · gpt56 · 333 AIC · ⌖ 21.5 AIC · ⊞ 17.5K · ◷

• expires on Oct 8, 2026, 3:44 AM UTC-08:00

[github-actions]

🎉 This pull request is included in a new release.

Release: v0.91.0