fix(integrations): escape control characters in SKILL.md frontmatter#3399
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mnriem merged 1 commit intoJul 9, 2026
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yaml.safe_dump with default_style='"' replaces the hand-rolled quote helpers in base.py and hermes, so newlines and control characters in template descriptions round-trip instead of producing unparseable YAML. Fixes github#3391 Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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Pull request overview
This PR fixes SKILL.md frontmatter generation for skills-based integrations by ensuring descriptions (and other frontmatter values) are emitted as valid, single-line, double-quoted YAML scalars even when the source contains newlines or control characters (per issue #3391).
Changes:
- Introduces
yaml_quote()insrc/specify_cli/integrations/base.py, delegating escaping/quoting toyaml.safe_dump(default_style='"')to correctly handle newlines and control characters. - Replaces the duplicated, hand-rolled
_quoteimplementations in bothSkillsIntegration.setup()and the Hermes integration withyaml_quote(). - Adds regression tests to verify round-tripping of multiline and control-character descriptions, including end-to-end SKILL.md generation and YAML frontmatter parsing.
Reviewed changes
Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.
| File | Description |
|---|---|
| tests/integrations/test_skill_frontmatter_quoting.py | Adds regression coverage for yaml_quote() and for generated SKILL.md frontmatter round-tripping hostile descriptions. |
| src/specify_cli/integrations/hermes/init.py | Switches Hermes SKILL.md frontmatter quoting to yaml_quote() to avoid invalid YAML for multiline/control characters. |
| src/specify_cli/integrations/base.py | Adds yaml_quote() and applies it to SkillsIntegration’s SKILL.md frontmatter generation. |
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kanfil
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Jul 11, 2026
Upstream merge (30 commits, 3 releases 0.12.9-0.12.11): - invoke_separator parse-success fix (github#3304) - Windows Store python3 stub skip + _interpreter_runs() probe (github#3385) - SKILL.md frontmatter control char escape via yaml_quote() (github#3399) - chained expression filters left-to-right refactor (github#3339) - refresh_shared_templates preserves recovered files (github#3378) - Goose yaml skill placeholder resolution (github#3374) - bundled version pin enforcement (github#3377) - integration test home isolation (github#3144) - py: script type in command templates (github#3403) - configurable shell step timeout (github#3404) - find plans in nested spec directories (github#3405) - plan.md phase numbering fix (github#3416) - PowerShell -Number 0 honor via ContainsKey (github#3412) - workflow.yml non-string scalar validation (github#3421) - plan-template.md self-referencing path fix (github#3417) - pre-commit config + trailing whitespace cleanup (github#3430) - malformed URL error handling (github#3433/github#3435/github#3437) - agent-context nested plan.md discovery (github#3301) - community catalog additions (EARS, Figma) (github#3407/github#3408) 9 conflicts resolved: pyproject.toml, integrations/base.py, agents.py, forge/__init__.py, hermes/__init__.py, create-new-feature-branch.ps1, test_git_extension.py, test_base.py, test_integration_devin.py. Template-to-preset alignment: added py: script lines to 6 preset commands, removed stale Phase 1 agent context line from plan preset, fixed phase numbering. Pre-merge fix: wrapped bare make_typer import with fallback. Assisted-by: opencode (model: glm-5.2, autonomous)
kanfil
added a commit
to tikalk/agentic-sdlc-spec-kit
that referenced
this pull request
Jul 11, 2026
Upstream merge (30 commits, 3 releases 0.12.9-0.12.11): - invoke_separator parse-success fix (github#3304) - Windows Store python3 stub skip + _interpreter_runs() probe (github#3385) - SKILL.md frontmatter control char escape via yaml_quote() (github#3399) - chained expression filters left-to-right refactor (github#3339) - refresh_shared_templates preserves recovered files (github#3378) - Goose yaml skill placeholder resolution (github#3374) - bundled version pin enforcement (github#3377) - integration test home isolation (github#3144) - py: script type in command templates (github#3403) - configurable shell step timeout (github#3404) - find plans in nested spec directories (github#3405) - plan.md phase numbering fix (github#3416) - PowerShell -Number 0 honor via ContainsKey (github#3412) - workflow.yml non-string scalar validation (github#3421) - plan-template.md self-referencing path fix (github#3417) - pre-commit config + trailing whitespace cleanup (github#3430) - malformed URL error handling (github#3433/github#3435/github#3437) - agent-context nested plan.md discovery (github#3301) - community catalog additions (EARS, Figma) (github#3407/github#3408) 9 conflicts resolved: pyproject.toml, integrations/base.py, agents.py, forge/__init__.py, hermes/__init__.py, create-new-feature-branch.ps1, test_git_extension.py, test_base.py, test_integration_devin.py. Template-to-preset alignment: added py: script lines to 6 preset commands, removed stale Phase 1 agent context line from plan preset, fixed phase numbering. Pre-merge fix: wrapped bare make_typer import with fallback. Assisted-by: opencode (model: glm-5.2, autonomous)
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Summary
Fixes #3391
SkillsIntegration.setup()and the hermes skill builder quoted SKILL.md frontmatter values with a hand-rolled helper that only escaped\and". A template description containing a newline or a control character (for example a YAML escape like\ain the source frontmatter, which parses to a real control byte) produced a broken or lossy SKILL.md: the newline split the quoted scalar across lines and the control byte was emitted raw, which is invalid in double-quoted YAML.Changes
yaml_quote()inintegrations/base.py: delegates toyaml.safe_dump(default_style='"'), which handles every escape case per spec. Output is byte-identical to the old helper for plain strings._quotehelper (base.py skill builder and hermes) now use it, removing the duplicated logic.yaml_quoteplus integration tests that render SKILL.md from hostile templates and re-parse the frontmatter withyaml.safe_load.Testing
uv run pytest tests/integrations/test_skill_frontmatter_quoting.py— 6 new testsuvx ruff check— cleanChecklist