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* chore(stdlib): add conformance tooling for the skills library
The library had no gate that could express what a valid skill is, so
malformed frontmatter, over-budget files and credential literals went
unnoticed. These scripts define and enforce that contract.
- validate-skills.py: extend with Agent Skills v1.0 conformance -
naming rules and directory agreement, an explicit activation trigger
in the description, canonical layout, the 500-line SKILL.md budget,
relative-link integrity, and two security rules (no unrestricted
Bash(*) grant, no credential literals). Structural checks now read a
skill as a whole so material moved into references/ still counts.
- split-skill-references.py: move the heaviest sections of an oversized
SKILL.md into references/. Verifies line by line that every source
line lands in exactly one output and refuses to write otherwise.
- generate-skill-inventory.py: derive SKILLS_INVENTORY.md and
DIRECTORY_STRUCTURE.md from the tree so they cannot drift.
- generate-skill-catalog.py: index the canonical layout only, count
references/ toward a skill's size, and stop truncating descriptions
at 200 characters - the catalog is the discovery surface and must
carry the activation trigger.
- .gitignore: Python bytecode from these scripts, and local .pcl state.
Reviewed-by: Security Analyst, Compiler Engineer, DevX Engineer
* fix(stdlib): bring all 174 skills to Agent Skills v1.0 conformance
No skill in the library was conformant. 41 of 175 failed the existing
validator outright, and none satisfied the spec. This pass fixes the
tree and records the result. See stdlib/CHANGELOG.md for the per-skill
versioning and migration notes.
BREAKING CHANGE: one skill removed, five moved, seven with a capability
withdrawn. Library version 2.0.0 -> 3.0.0.
Structure
- Convert 71 skills stored as flat files to <category>/<name>/SKILL.md,
the layout the spec requires and the only one able to carry companion
resources.
- Rename 5 directories that disagreed with their declared name:, so
resolution by path and by name stop giving different answers. The
repository docs already referenced the corrected paths.
- Merge the duplicate legal-technology skills into legaltech-expert and
delete legal-tech-expert, carrying over everything the survivor
lacked.
Metadata
- Repair 20 unparseable frontmatters: an H1 preceded the --- block and
the key was skill_id: instead of name:, so any parser reading
frontmatter at offset 0 saw no metadata at all. The objectives,
prerequisites and outcome they carried become real body sections.
- Add the missing version: to 21 skills, fold keywords into tags, move
expertise_level under metadata, and align 10 category: values with
their directory.
Discoverability
- Give all 174 descriptions an explicit "Use when ..." trigger, built
from each skill's own tags and section headings. 152 previously said
only what the skill was about, leaving an agent nothing to match on.
Progressive disclosure
- Split 127 oversized skills, moving bulk material into references/ read
on demand and leaving an index behind. A SKILL.md now averages 277
lines instead of 644 and none exceeds 500. Verified lossless line by
line against the previous revision.
Security
- Withdraw the unrestricted Bash(*) grant from 7 skills; none of the six
non-financial ones contained a single shell command. finance-expert
documents code that charges cards and reads bank accounts, so it now
grants no shell at all.
- Remove credential literals: Stripe keys, two JWT signing keys, an
Express session secret, a Redis password and WiFi credentials, all
inlined in examples. They load from the environment now.
- finance-expert: idempotency keys were documented but absent, so a
retry double-charged; webhook signature failures were not caught, so a
forged event raised uncaught instead of being rejected;
int(amount * 100) truncated fractions of a cent. All fixed, plus a
money-movement guardrails section.
- trading-expert: place_order routed without any pre-trade risk check
although a RiskManager sat unused in the next section. Risk validation
now runs before routing and raises rather than returning a boolean a
caller can ignore; live routing is opt-in.
- Correct an Ansible Vault example that showed plaintext under an
"encrypted" label.
Also fixes 8 broken documentation links and a prematurely closed code
fence in skill-creator-expert that leaked template content into prose.
Per the repository file-organization policy, four stale progress reports
(SKILLS_MANIFEST, COMPLETE_SKILLS_LIBRARY, COMPLETE_LIBRARY_MANIFEST,
PHASE_3_DATA_ANALYTICS) move out of stdlib/ into the gitignored
.roadmap/status/stdlib/; they claimed 31 of 100 skills complete. They
appear here as deletions because .roadmap/ is not tracked.
Reviewed-by: Security Analyst, Language Designer, DevX Engineer,
Documentation Specialist
* fix(skills): resolve standard library skills from their real layout
No stdlib skill was resolvable. SkillResolver looked for
`<stdlibDir>/<name>.md` with stdlibDir defaulting to `stdlib/skills`, a
directory that does not exist, and the path ignored the category level
the library actually uses. The two LSP providers had the same wrong
directory and scanned only one level deep, so neither completion nor
go-to-definition could see a skill either.
- skill-discovery.ts: enumerate skill entry points across the shapes in
use - a flat `<name>.md`, `<name>/SKILL.md`, and
`<category>/<name>/SKILL.md` - while skipping references/, scripts/
and assets/, which hold supporting material rather than entry points.
- skill-resolver.ts: point stdlibDir at `stdlib`, and look the name up
as a directory under any category as well as the two legacy shapes, so
existing custom stdlib directories keep working. The name is used as a
single path segment and rejected if it contains a separator or
traversal, so a reference cannot escape the stdlib root.
- Rewire both LSP providers onto the shared discovery helper.
Tests: 13 new cases covering the layouts, ordering, the references/
exclusion, path-traversal rejection, and an integration test that
resolves real shipped skills by bare name.
Reviewed-by: Compiler Engineer, Runtime Architect, Security Analyst
* feat(stdlib): add 17 skills covering the library's largest gaps
Selection was driven by cross-referencing coverage against observed usage
rather than by intuition: Stack Overflow and GitHub Octoverse data for
which technologies matter, and install rankings on public agent-skill
registries for the shape of skills people actually use.
That comparison found a mismatch of form, not only of coverage. The
most-installed skills in the ecosystem are procedures - tdd, refactoring,
frontend design, browser automation - while all 174 existing skills were
domain knowledge shaped as <domain>-expert. The new workflows/ category
closes that gap and introduces the <activity>-workflow convention.
New category workflows/ (4)
- tdd-workflow, refactoring-workflow, debugging-workflow,
code-review-workflow. code-review-workflow complements rather than
replaces code-review-expert: procedure versus judgement. Merge them if
the split proves confusing in use.
Applied AI (3) - the largest coverage gap
- llm-engineering-expert, rag-expert, agent-engineering-expert.
The library referenced LLMs in tags but covered none of it: pgvector
appeared zero times across 174 skills, LangChain once, MCP twice
despite the repository shipping an MCP integration guide.
Capabilities (2)
- document-processing-expert (PDF, DOCX, XLSX, PPTX in one skill),
browser-automation-expert (a client against third-party sites,
distinct from playwright-expert which tests your own application).
Data (3)
- mysql-expert, the second most used database and previously absent
while rarer stores had skills; analytical-databases-expert;
stream-processing-expert.
Security (3)
- secrets-management-expert, supply-chain-security-expert (OWASP A03
2025), identity-access-expert (OWASP A01).
Interface and meta (2)
- accessibility-expert: design/ held only design-expert, which despite
its name covers software architecture, so WCAG had no home.
- skill-router: find and compose skills across 191, with a
disambiguation table for overlapping pairs.
Grouping by decision context rather than by technology keeps the growth
to 17 skills for roughly 50 topics. Five vector stores live inside
rag-expert; four document formats inside document-processing-expert.
Per-tool depth sits in references/, which the progressive-disclosure work
in 3.0.0 made cheap.
Four further gaps are better served by extending existing skills -
PyTorch and TensorFlow in ml-expert, OpenTelemetry in monitoring-expert,
Pulumi and Crossplane in terraform-expert - and are not in this change.
Library 3.0.0 -> 3.1.0, additive only. Adds the workflows label to the
inventory generator; catalogue, inventory, structure and CHANGELOG
regenerated.
Reviewed-by: Product Strategist, Security Analyst, DevX Engineer,
Documentation Specialist
* fix(test): create test directories with mkdtempSync
CodeQL flagged js/insecure-temporary-file (CWE-377) on both suites.
`join(tmpdir(), <predictable name>)` followed by mkdirSync creates a
world-readable directory at a guessable path, so another local user can
pre-create it or plant a symlink between the name being computed and the
directory being created.
mkdtempSync creates the directory atomically with a random suffix and
0700 permissions, which closes both the disclosure and the race.
One occurrence is new in this branch (skill-discovery); the other
pre-dates it in skill-resolver and is fixed in the same pass rather than
left as a known finding in a file this branch already touches.
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name, version, description, category, tags, allowed-tools, metadata
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| e-learning-expert | 1.1.0 | Build comprehensive e-learning solutions including course management, student engagement, assessment systems, and learning analytics. Use when the user mentions an LMS, online courses, SCORM or xAPI, student engagement, assessments and grading, or learning analytics. | domains |
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E-Learning Expert
Build comprehensive e-learning solutions including course management, student engagement, assessment systems, and learning analytics.
Learning Objectives
- Master learning management systems (LMS)
- Understand course creation and content delivery
- Implement student engagement and assessment systems
- Apply learning analytics and progress tracking
- Navigate adaptive learning and personalization
Prerequisites
- Understanding of educational principles and pedagogy
- Knowledge of instructional design models
- Familiarity with multimedia content creation
- Experience with online learning platforms
Core Concepts
Learning Management Systems (LMS)
Platforms that deliver, track, and manage educational content, supporting course creation, student enrollment, progress tracking, and assessment with comprehensive reporting capabilities.
Course Design & Content Delivery
Structured approach to creating engaging learning experiences using instructional design principles, multimedia content, interactive elements, and various delivery formats (video, text, interactive).
Student Engagement & Collaboration
Tools and strategies to maintain learner motivation including discussion forums, peer collaboration, gamification, social learning, and interactive activities that promote active learning.
Assessment & Evaluation
Systems for measuring learning outcomes through quizzes, assignments, projects, and automated grading with feedback mechanisms to support formative and summative assessment.
Learning Analytics
Data-driven insights into student performance, engagement patterns, completion rates, and learning effectiveness to optimize course design and provide personalized interventions.
Best Practices
Course Design
- Follow instructional design models (ADDIE, SAM)
- Chunk content into digestible modules
- Include varied content types for different learning styles
- Set clear learning objectives
- Provide scaffolded learning paths
- Include formative and summative assessments
- Design for accessibility (WCAG compliance)
Student Engagement
- Use multimedia and interactive content
- Implement discussion forums and peer interaction
- Provide timely feedback on assessments
- Gamify learning with badges and achievements
- Send engagement reminders and notifications
- Create collaborative learning activities
- Offer multiple paths through content
Assessment
- Align assessments with learning objectives
- Use varied assessment types
- Provide immediate feedback on quizzes
- Include rubrics for subjective assessments
- Allow multiple attempts for practice
- Balance automated and manual grading
- Track assessment analytics
Learning Analytics
- Monitor engagement and completion metrics
- Identify at-risk students early
- Track time-on-task and effort
- Analyze content effectiveness
- Measure learning outcomes
- Use data to improve course design
- Respect student privacy
Anti-Patterns
Poor Practices
- Content dumps without structure
- Passive video-only courses
- No interaction or engagement
- Delayed or missing feedback
- One-size-fits-all approach
- Inaccessible content
- Ignoring analytics data
- Poor mobile experience
Common Mistakes
- Overloading courses with content
- Unclear learning objectives
- Inconsistent grading criteria
- Technical barriers to access
- No instructor presence
- Inadequate student support
- Unrealistic completion timelines
- Not testing course flow
Reference Documentation
Detailed material lives alongside this skill and is read on demand:
- Code Examples — LMS Core System, Assessment System, Learning Analytics Engine
Resources
LMS Platforms
- Canvas - Open-source LMS
- Moodle - Popular open-source platform
- Blackboard - Enterprise LMS
- Google Classroom - Simple LMS
- Docebo - AI-powered LMS
- TalentLMS - Cloud-based solution
Content Creation Tools
- Articulate Storyline - E-learning authoring
- Adobe Captivate - Interactive courses
- Camtasia - Video editing
- H5P - Interactive content
Standards
- SCORM - Content packaging standard
- xAPI (Tin Can API) - Learning data standard
- LTI - Learning Tools Interoperability
- QM Standards - Quality Matters rubric
Learning Resources
- Instructional Design Central
- eLearning Industry publications
- ATD (Association for Talent Development)
- Online Learning Consortium
Part of the PCL Standard Library - Master e-learning technology and create engaging online educational experiences.