A skill_file row whose path is the skill's own SKILL.md (persisted by
older builds or direct create/update API calls) collides with the
primary content the daemon writes itself, failing task prep with
errPathPreExists on every non-codex local runtime (#3489).
#3526 guarded this with strings.EqualFold(path, "SKILL.md") at the
daemon write site and the three API ingress points, but the stored path
is not canonicalized: "./SKILL.md" or "sub/../SKILL.md" slip past the
exact-match guard while filepath.Join still resolves them onto the same
SKILL.md, so prep can still break.
Extract one canonical helper, skill.IsReservedContentPath, that cleans
the path before the case-insensitive compare, and use it at all four
sites (execenv writeSkillFiles, skill create, update, single-file
upsert). Add a daemon-side regression test for writeSkillFiles ignoring
a bundled SKILL.md (exact + "./" spellings) — the load-bearing fix
previously had only API-layer coverage — plus a unit test for the helper.
Existing poisoned rows are intentionally left in place (skipped at prep)
per the decision on MUL-2928.
MUL-2928
Follow-up to #3526; supersedes #3560.
Co-authored-by: J <j@multica.ai>
Co-authored-by: multica-agent <github@multica.ai>
The Go SKILL.md frontmatter parser unmarshalled into a {Name,Description}
string struct, so a non-scalar value (a list/map written where a scalar
belongs) made the whole decode fail and dropped even a valid sibling
`name`. The TS parser instead kept the name and JSON-encoded the value,
so the file-viewer (TS) and the import path (Go) could disagree about
the same SKILL.md.
Decode into a generic map and coerce per key on the Go side, mirroring
the TS coercion (scalars -> literal form, sequences/mappings -> JSON), so
both sides produce identical results and a structured value never
discards a sibling key. Rename ParseFrontmatter -> ParseSkillFrontmatter
to remove the cross-language name clash with the TS parseFrontmatter
(which returns {frontmatter, body}), and drop the unused TS
parseSkillFrontmatter export.
Add parity tests for sequence/mapping values plus name-only,
description-only, leading-blank-line and triple-dash-in-body edge cases
on both sides.
Follow-up to #3543 / MUL-2842.
Co-authored-by: J <j@multica.ai>
Co-authored-by: multica-agent <github@multica.ai>
Three independent line-based frontmatter parsers only handled
single-line `description: value`, so a YAML block scalar
(`description: |`) collapsed to the literal "|" and the rest of the
description was dropped before it ever reached the database.
Replace all three with real YAML decoders that understand block
scalars, folded scalars and quoted values:
- server/internal/skill: shared ParseFrontmatter via gopkg.in/yaml.v3,
used by both the handler import path and daemon local-skill discovery
- packages/core/skills: shared parseFrontmatter via the yaml package
- file-viewer renders multi-line frontmatter values (whitespace-pre-wrap)
Both parsers fall back to empty values on malformed YAML, preserving the
previous non-fatal behaviour.
