## Description

Resolves a batch of documentation drift issues where prose docs and
READMEs fell behind code, agent, and path changes from recent PRs. Each
fix realigns stale references with the current source of truth:

* **BRD/PRD output path move** (PR #2098): updated lifecycle, role, and
planning docs to point at `docs/project-planning/` instead of the
retired `docs/brds/` and `docs/prds/`.
* **Eval CI behavior** (PRs #1834, #1949): documented shared-spec
tag-aware run behavior, the missing eval npm commands, and the `mixed`
stub mode plus sub-threshold `advisory-fail` status.
* **Copyright tooling** (PR #2169): documented the new
`CopyrightHeader.psm1` module and the `Test-CopyrightHeaders.ps1` `-Fix`
switch and canonical 2026 header format.
* **Collection helpers** (PR #1834): documented the new strict-safe
maturity vocabulary functions in `CollectionHelpers.psm1`.
* **rai-license-posture.instructions.md‎**: fix dead link and added
rai-license-posture instruction conformance stimulus to
`instructions.eval.yml`

## Related Issue(s)

Closes #2179
Closes #2180
Closes #2181
Closes #2182
Closes #2183
Closes #2187
Closes #2188
Closes #2191

## Type of Change

Select all that apply:

**Code & Documentation:**

* [ ] Bug fix (non-breaking change fixing an issue)
* [ ] New feature (non-breaking change adding functionality)
* [ ] Breaking change (fix or feature causing existing functionality to
change)
* [x] Documentation update

**Infrastructure & Configuration:**

* [ ] GitHub Actions workflow
* [ ] Linting configuration (markdown, PowerShell, etc.)
* [ ] Security configuration
* [ ] DevContainer configuration
* [ ] Dependency update

**AI Artifacts:**

* [ ] Reviewed contribution with `prompt-builder` agent and addressed
all feedback
* [ ] Copilot instructions (`.github/instructions/*.instructions.md`)
* [ ] Copilot prompt (`.github/prompts/*.prompt.md`)
* [ ] Copilot agent (`.github/agents/*.agent.md`)
* [ ] Copilot skill (`.github/skills/*/SKILL.md`)
* [ ] Copilot hook (`.github/hooks/*/*.json`)
* [x] Eval spec added/updated for changed AI artifacts (`evals/`)

**Other:**

* [ ] Script/automation (`.ps1`, `.sh`, `.py`)
* [ ] Other (please describe):

## Testing

<!-- Add manual testing descriptions when applicable. Run the
documentation validation commands below before merging. -->

## Checklist

### Required Checks

* [x] Documentation is updated (if applicable)
* [x] Files follow existing naming conventions
* [x] Changes are backwards compatible (if applicable)
* [ ] Tests added for new functionality (if applicable) (N/A —
documentation-only)

### Required Automated Checks

The following validation commands must pass before merging:

* [x] Markdown linting: `npm run lint:md`
* [x] Spell checking: `npm run spell-check`
* [x] Frontmatter validation: `npm run lint:frontmatter`
* [ ] Skill structure validation: `npm run validate:skills`
* [x] Link validation: `npm run lint:md-links`
* [ ] PowerShell analysis: `npm run lint:ps`
* [ ] Plugin freshness: `npm run plugin:generate`
* [ ] Docusaurus tests: `npm run docs:test`

## Security Considerations

* [x] This PR does not contain any sensitive or NDA information
* [ ] Any new dependencies have been reviewed for security issues (N/A —
no dependency changes)
* [ ] Security-related scripts follow the principle of least privilege
(N/A — no security scripts modified)

## Additional Notes

Documentation-only change. #2186 (DT Coach session-path rename) is
deliberately excluded from this batch.

---------

Co-authored-by: Bill Berry <WilliamBerryiii@users.noreply.github.com>