position-sizer

Calculate risk-based position sizes for long stock trades. Use when user asks about position sizing, how many shares to buy, risk per trade, Kelly criterion, ATR-based sizing, fractional-share sizing, or portfolio risk allocation. Supports stop-loss distance calculation, volatility scaling, and sector concentration checks.

Quality

93%

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Securityby

Passed

No findings from the security scan

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 commands, a clear six-step workflow, and properly signaled one-level-deep references. Minor conciseness and validation-checkpoint gaps keep it just short of top marks.

Suggestions

Add an explicit validation checkpoint in the workflow (e.g., verify dollar_risk ≈ risk_pct × account_size and confirm the report file was written) before presenting results to the user.

Move or condense the inline FINRA date-specific rule (2026-06-04 / 2027-10-20) into the references file or a clearly marked regulatory-notes section so time-sensitive content does not burden the main flow.

Trim Key Principles entries that restate general knowledge (e.g., loss/recovery asymmetry) and keep only the skill-specific rules such as floor-never-round-up and half-Kelly.

Dimension	Reasoning	Score
Conciseness	Mostly efficient with executable commands and example output, but the Key Principles section restates well-known concepts (e.g., a 50% loss needing a 100% gain) and the inline FINRA date (2026-06-04) is time-sensitive content not placed in a deprecated/old-patterns section.	4 / 5
Actionability	Provides fully executable, copy-paste-ready CLI invocations for every mode (Fixed Fractional, ATR, Kelly, fractional, constraints) plus a concrete example JSON report covering the common cases.	5 / 5
Workflow Clarity	A clearly sequenced six-step workflow with concrete commands, but it lacks explicit validation/verification checkpoints or a validate-fix-retry loop to confirm calculation sanity or report generation.	4 / 5
Progressive Disclosure	SKILL.md is a clear overview pointing one level deep to real bundle files (references/sizing_methodologies.md, scripts/position_sizer.py) that are explicitly signaled in Step 3 and the Resources section, with content appropriately split.	5 / 5
	Total	18 / 20 Passed

Description

100%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 concretely states capabilities, supplies natural trigger terms, and explicitly covers both what the skill does and when to use it. No vague fluff or over-claims.

Dimension	Reasoning	Score
Specificity	Lists multiple concrete actions — 'Calculate risk-based position sizes', 'stop-loss distance calculation, volatility scaling, and sector concentration checks' — giving comprehensive coverage of the skill's capabilities.	5 / 5
Completeness	Explicitly answers both 'what' (Calculate risk-based position sizes for long stock trades) and 'when' via a concrete 'Use when user asks about...' clause with multiple trigger phrases.	5 / 5
Trigger Term Quality	Covers natural user phrasing and synonyms including 'position sizing', 'how many shares to buy', 'risk per trade', 'Kelly criterion', 'ATR-based sizing', 'fractional-share sizing', and 'portfolio risk allocation'.	5 / 5
Distinctiveness Conflict Risk	Occupies a clear niche (long stock trade position sizing) with distinct, specific triggers, making overlap with unrelated skills minimal.	5 / 5
	Total	20 / 20 Passed

Validation

100%

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 — 16 / 16 Passed

Validation for skill structure

No warnings or errors.

Repository: tradermonty/claude-trading-skills
Path: skills/position-sizer/SKILL.md
Commit: 3930d34

Reviewed: 1 day ago

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