functions-development

Build serverless Go or Python functions for Falcon Foundry apps. TRIGGER when user asks to "create a function", "write a serverless function", "build backend logic", runs `foundry functions create`, or needs help with FDK handler patterns, function testing, or collection integration from functions. DO NOT TRIGGER for calling Falcon platform APIs from functions — use functions-falcon-api instead. DO NOT TRIGGER for workflow YAML or UI components.

Quality

90%

Does it follow best practices?

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Securityby

Low

Low-risk findings worth noting

Quality

Content

86%Weight 40%Scale 1-5

Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.

A well-structured, highly actionable skill body with executable code, comparison tables, and clean progressive disclosure into three real reference files. Its main weakness is repetition of the credentials/security warning across multiple sections, which inflates token usage without adding guidance.

Suggestions

Consolidate the raw-HTTP/env-var security warning into one canonical location (the Credential Management table) and have other sections reference it rather than restating the full rationale each time.

Convert the schema-fix narrative warning into an explicit validation checkpoint (e.g., a verify command or manifest check) so the workflow has a concrete pass/fail gate between recreate and redeploy.

Move the repeated "definition_id UUID locally vs name in production" note into a single spot — it currently appears in both the API Integrations section and Common Pitfalls.

Dimension	Reasoning	Score
Conciseness	Mostly efficient with purposeful tables and code blocks, but the raw-HTTP/env-var security warning is repeated across the credential table, requirements section, and Common Pitfalls, and normative headers (CRITICAL/MUST) add padding that could be trimmed.	4 / 5
Actionability	Provides copy-paste-ready CLI commands, complete Go and Python FDK handler examples, manifest YAML, and concrete APIIntegrations proxy calls with realistic values covering the common cases.	5 / 5
Workflow Clarity	The "Fixing a Function Missing Schemas" flow is a clearly numbered sequence with a validation-leaning warning about step 3 and the 409 failure mode, but checkpoint/verify commands are mostly described narratively rather than as explicit validation steps.	4 / 5
Progressive Disclosure	Clear overview with a Reference Files table mapping tasks to three real one-level-deep reference files (verified present: python-patterns.md, go-patterns.md, testing-patterns.md), each back-linking to the parent skill, with bulk detail appropriately offloaded.	5 / 5
	Total	18 / 20 Passed

Description

95%Weight 40%Scale 1-5

Based on the skill's description, can an agent find and select it at the right time? Clear, specific descriptions lead to better discovery.

A strong, third-person description that clearly states the skill's purpose and gives concrete natural-language triggers alongside explicit anti-triggers for sibling skills. Minor specificity gaps (error handling, deployment) keep it just short of fully comprehensive on action coverage.

Dimension	Reasoning	Score
Specificity	Lists several concrete actions — building serverless Go/Python functions, FDK handler patterns, function testing, and collection integration — but omits some adjacent capabilities like error handling and deployment, leaving minor coverage gaps.	4 / 5
Completeness	Explicitly answers both what ("Build serverless Go or Python functions for Falcon Foundry apps") and when ("TRIGGER when user asks...") with concrete trigger phrases and anti-triggers.	5 / 5
Trigger Term Quality	Comprehensive natural trigger phrases ("create a function", "write a serverless function", "build backend logic", the `foundry functions create` command) plus explicit exclusions, covering synonyms and a CLI invocation users would actually run.	5 / 5
Distinctiveness Conflict Risk	Clear Foundry-serverless-functions niche with explicit DO NOT TRIGGER boundaries pointing to sibling skills (functions-falcon-api, workflows-development), minimizing overlap risk.	5 / 5
	Total	19 / 20 Passed

Validation

81%

Warnings & errors only

Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.

Validation — 13 / 16 Passed

Validation for skill structure

Criteria	Description	Result
metadata_version	'metadata.version' is missing	Warning
frontmatter_unknown_keys	Unknown frontmatter key(s) found; consider removing or moving to metadata	Warning
relative_links	Relative link issues: 5 suspicious	Warning

	Total	13 / 16 Passed

Repository: CrowdStrike/foundry-skills
Path: skills/functions-development/SKILL.md
Commit: c01ff6b

Reviewed: about 20 hours ago

Table of Contents

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