## Thinking Path
> - Paperclip is the open source control plane teams use to manage AI
agents for work.
> - Company skills are imported from `SKILL.md` files and rely on YAML
frontmatter to describe what each skill does.
> - Multi-line descriptions commonly use YAML block scalars (`>` and
`|`), but the broken parser path behind #4989 reduced those descriptions
to a literal `>` or `|`.
> - The earliest contributor fix for that bug was PR #5046, so this
branch keeps that PR as the canonical merge target instead of replacing
it.
> - Follow-up work from #5071 and #8258 was then transplanted onto this
earlier branch so the final PR preserves contributor credit while still
shipping the strongest complete fix.
> - The resulting change fixes block-scalar parsing in the shared
frontmatter path, aligns server company-skill imports with that shared
parser, and prevents already-stale stored markers from rendering as junk
in the UI.
## Linked Issues or Issue Description
- Fixes#4989
- Refs #2863
- Refs #788
- Related superseded PRs: #5071, #8258
## What Changed
- Kept the original PR #5046 server-side company-skill fix and
regression coverage as the base branch history.
- Added the missing YAML chomping and indicator hardening explored
further in #5071.
- Moved frontmatter parsing to the shared parser path so
`packages/shared`, `packages/skills-catalog`, and server company-skill
imports stay aligned.
- Added UI summary sanitization and fallback handling so stale stored
`>` / `|` values no longer render as visible junk in company-skill
cards.
- Added regression coverage for shared frontmatter parsing,
skills-catalog parsing, company-skill imports, and stale-summary
fallback behavior.
## Verification
- Passed locally: `pnpm exec vitest run
packages/shared/src/frontmatter.test.ts
packages/skills-catalog/src/frontmatter.test.ts
server/src/__tests__/company-skills.test.ts
ui/src/lib/company-skill-summary.test.ts`
- Passed locally: `pnpm --filter @paperclipai/shared typecheck`
- Passed locally: `pnpm --filter @paperclipai/skills-catalog typecheck`
- Not fully runnable in this worktree: `pnpm --filter
@paperclipai/server typecheck` currently fails in `packages/plugins/sdk`
before reaching server code because local workspace `node_modules` type
deps are missing (`TS2688` for `node` / `react`).
- GitHub Actions / PR checks are rerunning on PR #5046 head
`005290b7557725abf748d00f36dd24ea0d919aba`.
## Risks
- Medium-low risk: the fix now touches shared parser code, server
company-skill imports, and UI fallback display rather than only the
server import path.
- The parser is still intentionally narrower than a full YAML
implementation; this change focuses on block-scalar correctness and the
stale-description rendering path relevant to #4989 / #2863.
- This branch intentionally supersedes narrower overlapping work from
#5071 and duplicate work from #8258 once the survivor PR is green.
> For core feature work, check [`ROADMAP.md`](ROADMAP.md) first and
discuss it in `#dev` before opening the PR. Feature PRs that overlap
with planned core work may need to be redirected — check the roadmap
first. See `CONTRIBUTING.md`.
## Model Used
- OpenAI Codex / GPT-5-based coding agent with local shell and
code-editing tools enabled.
## Checklist
- [x] I have included a thinking path that traces from project context
to this change
- [x] I have specified the model used (with version and capability
details)
- [x] I have checked ROADMAP.md and confirmed this PR does not duplicate
planned core work
- [x] I have searched GitHub for duplicate or related PRs and linked
them above
- [x] I have either (a) linked existing issues with `Fixes: #` / `Closes
#` / `Refs #` OR (b) described the issue in-PR following the relevant
issue template
- [x] I have run tests locally and they pass
- [x] I have added or updated tests where applicable
- [ ] If this change affects the UI, I have included before/after
screenshots
- [x] I have updated relevant documentation to reflect my changes
- [x] I have considered and documented any risks above
- [ ] All Paperclip CI gates are green
- [ ] Greptile is 5/5 with no open P2s, recommendations, or follow-ups
- [x] I will address all Greptile and reviewer comments before
requesting merge
---------
Co-authored-by: Devin Foley <devin@paperclip.ing>
5f16efb3d0