Vercel Composition Patterns
supabase/supabase
React composition patterns that scale. An agent skill from supabase/supabase.
Find all model IDs referenced in local AI-coding session log files and debug logs, then compare them against the keys in src/modelPricing.json.
Install Validate Model Pricing
$ npx skills add rajbos/ai-engineering-fluency --skill validate-model-pricing -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install rajbos/ai-engineering-fluency validate-model-pricing --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/rajbos/ai-engineering-fluency.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.claude/skills/validate-model-pricing .claude/skills/validate-model-pricing && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "validate-model-pricing" agent skill from https://github.com/rajbos/ai-engineering-fluency/tree/main/.claude/skills/validate-model-pricing into .claude/skills/validate-model-pricing/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "validate-model-pricing", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/rajbos/ai-engineering-fluency/tree/main/.claude/skills/validate-model-pricingType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add rajbos/ai-engineering-fluency --skill validate-model-pricing -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install rajbos/ai-engineering-fluency validate-model-pricing --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/rajbos/ai-engineering-fluency.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.claude/skills/validate-model-pricing .agents/skills/validate-model-pricing && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "validate-model-pricing" agent skill from https://github.com/rajbos/ai-engineering-fluency/tree/main/.claude/skills/validate-model-pricing into .agents/skills/validate-model-pricing/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "validate-model-pricing", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add rajbos/ai-engineering-fluency --skill validate-model-pricing -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install rajbos/ai-engineering-fluency validate-model-pricing --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/rajbos/ai-engineering-fluency.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.claude/skills/validate-model-pricing .cursor/skills/validate-model-pricing && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "validate-model-pricing" agent skill from https://github.com/rajbos/ai-engineering-fluency/tree/main/.claude/skills/validate-model-pricing into .cursor/skills/validate-model-pricing/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "validate-model-pricing", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/rajbos/ai-engineering-fluency.git --path .claude/skills/validate-model-pricing--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add rajbos/ai-engineering-fluency --skill validate-model-pricing -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install rajbos/ai-engineering-fluency validate-model-pricing --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/rajbos/ai-engineering-fluency.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.claude/skills/validate-model-pricing .gemini/skills/validate-model-pricing && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "validate-model-pricing" agent skill from https://github.com/rajbos/ai-engineering-fluency/tree/main/.claude/skills/validate-model-pricing into .gemini/skills/validate-model-pricing/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "validate-model-pricing", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install rajbos/ai-engineering-fluency validate-model-pricingInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add rajbos/ai-engineering-fluency --skill validate-model-pricing -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/rajbos/ai-engineering-fluency.git skills-src && mkdir -p .github/skills && cp -r skills-src/.claude/skills/validate-model-pricing .github/skills/validate-model-pricing && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "validate-model-pricing" agent skill from https://github.com/rajbos/ai-engineering-fluency/tree/main/.claude/skills/validate-model-pricing into .github/skills/validate-model-pricing/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "validate-model-pricing", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add rajbos/ai-engineering-fluency --skill validate-model-pricing -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install rajbos/ai-engineering-fluency validate-model-pricing --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/rajbos/ai-engineering-fluency.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.claude/skills/validate-model-pricing .opencode/skills/validate-model-pricing && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "validate-model-pricing" agent skill from https://github.com/rajbos/ai-engineering-fluency/tree/main/.claude/skills/validate-model-pricing into .opencode/skills/validate-model-pricing/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "validate-model-pricing", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
validate-model-pricing- GitHub stars
- 116
- Token cost
- ~1.2k tokens
- SKILL.md length
- 405 words
- Files
- 1
- Skills in repo
- 21
- Repo updated
- First seen
- Licence
- MIT
At a glance
Find all model IDs referenced in local AI-coding session log files and debug logs, then compare them against the keys in src/modelPricing.json.
- Works in 2 steps: Are there models in my session logs with… → Are there pricing entries that were…
- Development work in your project
- SKILL.md covers Relationship to Other Skills, Usage, Interpreting Output and Files in This Directory
- Calls node
What it does
Validate Model Pricing is an agent skill from rajbos/ai-engineering-fluency. Find all model IDs referenced in local AI-coding session log files and debug logs, then compare them against the keys in src/modelPricing.json. Reports models found in logs that have no pricing entry (unknown — informational only) and pricing entries never observed locally (unused). Use after adding a new model to modelPricing.json, after seeing unexpected cost attributions, or to discover which new models have appeared in recent sessions. Depends on file discovery patterns from the validate-session-schemas skill.
Its SKILL.md is about 1.2k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It sits in Development. The repository describes itself as: Extension that shows information about the estimated token usage and more of AI in editors/CLI's. The licence is MIT.
When your agent uses it
- Development work in your project
Example prompts
- “/validate-model-pricing”
Requirements
- Node.js
Workflow steps
2 steps, taken from the first numbered list in SKILL.md.
- Are there models in my session logs with no pricing entry?
- Are there pricing entries that were never seen locally?
What it can do on your machine
Read from SKILL.md and the folder at commit 257ede3. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
Shell commands in SKILL.md call:
node
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Validate Model Pricing loads about 1.2k tokens when it runs. Until then it costs about 136 tokens; SKILL.md has 405 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
The full file from rajbos/ai-engineering-fluency at commit 257ede3, republished under its MIT licence (© rajbos). 405 words, ~1,159 tokens.
Download SKILL.mdSave it as
.claude/skills/validate-model-pricing/SKILL.md (or your agent's skills folder).- name
- validate-model-pricing
- description
- Find all model IDs referenced in local AI-coding session log files and debug logs, then compare them against the keys in src/modelPricing.json. Reports models found in logs that have no pricing entry (unknown — informational only) and pricing entries never observed locally (unused). Use after adding a new model to modelPricing.json, after seeing unexpected cost attributions, or to discover which new models have appeared in recent sessions. Depends on file discovery patterns from the validate-session-schemas skill.
Validate Model Pricing Skill
Scans recent local AI-coding session log files (and Copilot Chat debug logs) for
every model ID that was actually used, then cross-references that list against the
keys in src/modelPricing.json.
It answers two questions:
Are there models in my session logs with no pricing entry? Models that appear in log files but have no key in
modelPricing.jsonfall back togpt-4o-minipricing — which may over- or under-estimate cost significantly. These are reported as UNKNOWN (informational; not an error).Are there pricing entries that were never seen locally? Keys in
modelPricing.jsonthat don't match any log file model ID are reported as UNUSED LOCALLY (informational; they may be used by other machines or team members).
Relationship to Other Skills
This skill reuses the same file discovery patterns as the
validate-session-schemas skill — it
covers the same set of file-based platforms:
| Platform | Files scanned |
|---|---|
| Copilot Chat (VS Code) | workspaceStorage/*/chatSessions/*.{json,jsonl}, globalStorage/github.copilot-chat/**/*.{json,jsonl} |
| Copilot CLI | ~/.copilot/session-state/**/*.{json,jsonl} |
| JetBrains Copilot | ~/.copilot/jb/**/partition-*.jsonl |
| Claude Code | ~/.claude/projects/**/*.jsonl |
| Gemini CLI | ~/.gemini/tmp/**/session-*.jsonl |
| Antigravity | ~/.gemini/antigravity/brain/**/.system_generated/logs/transcript.jsonl |
| OpenCode | <XDG_DATA_HOME>/opencode/storage/session/**/ses_*.json |
| Debug logs | workspaceStorage/*/GitHub.copilot-chat/debug-logs/*/main.jsonl |
Debug logs use llm_request JSONL events that contain an attrs.model field — this
is the most authoritative source of model IDs for VS Code chat sessions.
Usage
# Default: scan last 30 days, at most 20 files per platform
node .github/skills/validate-model-pricing/validate-model-pricing.js
# Widen the look-back window
node .github/skills/validate-model-pricing/validate-model-pricing.js --days 90
# Scan more files per platform
node .github/skills/validate-model-pricing/validate-model-pricing.js --max 50
# Machine-readable JSON output
node .github/skills/validate-model-pricing/validate-model-pricing.js --json
# Show all models from logs, even those that do match a pricing entry
node .github/skills/validate-model-pricing/validate-model-pricing.js --verboseOptions
| Flag | Meaning |
|---|---|
--days N | Only consider files modified within the last N days (default 30; 0 = no limit) |
--max N | Analyze at most N most-recent files per platform (default 20) |
--json | Emit machine-readable JSON only |
--verbose | Also list models that matched a pricing entry |
-h, --help | Show usage |
Show full SKILL.md (159 more words)Show less
Exit codes
| Code | Meaning |
|---|---|
0 | Completed successfully (unknown models are informational, not errors) |
2 | Configuration / environment error (bad args, missing modelPricing.json) |
Interpreting Output
UNKNOWN models
A model ID found in log files that has no exact key in modelPricing.json.
This means cost estimation falls back to gpt-4o-mini pricing.
Common causes:
- New model released after the pricing file was last updated
- Dot/hyphen format mismatch — e.g.
mistral-medium-3.5vsmistral-medium-3-5 - Model ID contains a
copilot/prefix that was not stripped
Resolution: Add the model key (and a copilotPricing block if applicable) to
src/modelPricing.json, then re-run the skill to confirm coverage.
UNUSED LOCALLY models
A key in modelPricing.json that matched no model ID in the scanned log files.
These entries are not errors — they may be used on other machines, by teammates
(via the sharing server), or be pre-emptively added for future models.
Files in This Directory
- SKILL.md — This file; instructions for the skill
- validate-model-pricing.js — Node.js script that performs the scan and comparison
© rajbos, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
Just SKILL.md in .claude/skills/validate-model-pricing of rajbos/ai-engineering-fluency.
Open the folder on GitHubat commit 257ede3
Compare with similar skills
Validate Model Pricing next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Validate Model Pricing this skillrajbos/ai-engineering-fluency | 116 | — | ~1.2k | Automated safety check: Pass | MIT | |
| Vercel Composition Patternssupabase/supabase | 111k | 58 repos | ~726 | Automated safety check: Pass | MIT | |
| Finishing a Development Branchobra/superpowers | 297k | 5 repos | ~1.9k | Automated safety check: Pass | MIT | |
| Typescript Advanced Typesrolling-scopes/rsschool-app | 10k | 25 repos | ~4.2k | Automated safety check: Pass | MPL-2.0 | |
| PR Babysitteropeninterpreter/openinterpreter | 69k | 3 repos | ~4.2k | Automated safety check: Pass | Apache-2.0 | |
| Code Review ChecklistshareAI-lab/learn-claude-code | 78k | 5 repos | ~1.1k | Automated safety check: Pass | MIT |
Similar skills
- Official
Finishing a Development Branch
obra/superpowers
Walks the last step of a branch: confirm tests pass, detect the git environment, ask how to integrate, carry out your choice and clean up the worktree.
Typescript Advanced Types
rolling-scopes/rsschool-app
Master TypeScript's advanced type system including generics, conditional types, mapped types, template literals, and utility types for building type-safe applications.
PR Babysitter
openinterpreter/openinterpreter
Watches an open GitHub pull request until it merges, handling review comments, diagnosing CI failures and retrying flaky checks along the way.
Code Review Checklist
shareAI-lab/learn-claude-code
Reviews code against a five-part checklist covering security, correctness, performance, maintainability and testing, and reports findings in a fixed format.
Greploop
onyx-dot-app/onyx
Iteratively improves a PR (GitHub), MR (GitLab), or shelved changelist (Perforce) until Greptile gives it a 5/5 confidence score with zero unresolved comments.
More from rajbos/ai-engineering-fluency
All 21 skills in this repoCheck Urls
rajbos/ai-engineering-fluency
Find all hardcoded URLs in TypeScript source files and verify they resolve (return HTTP 2xx/3xx).
Create Issue
rajbos/ai-engineering-fluency
Create a well-scoped GitHub issue in this repo. An agent skill from rajbos/ai-engineering-fluency.
Deduplicate Code
rajbos/ai-engineering-fluency
Detect copy-pasted code blocks across the shared source (vscode-extension/src, the repo-root src/, cli/src) with the dependency-free check-code-duplication.js detector, then pick one duplicate group…
Improve Tool Families
rajbos/ai-engineering-fluency
Analyze coverage of the vscode-extension's tool-family definitions (DEFAULTTOOLFAMILIES in vscode-extension/src/toolFamilies.ts) against the canonical tool-name list in src/toolNames.json and/or a…
Load Cache Data
rajbos/ai-engineering-fluency
Load and display the last 10 cache entries as raw JSON output.
PR Risk Review
rajbos/ai-engineering-fluency
Assess the risk of a changeset (a PR, a branch, or the working tree) and classify it as low, medium, or high with a written rationale.
Related
Categories
Questions about Validate Model Pricing
What does Validate Model Pricing do?
Find all model IDs referenced in local AI-coding session log files and debug logs, then compare them against the keys in src/modelPricing.json. Validate Model Pricing is an agent skill from rajbos/ai-engineering-fluency.json.
When should I use Validate Model Pricing?
Validate Model Pricing fits situations like: development work in your project.
How do I install Validate Model Pricing in Claude Code?
Run `npx skills add rajbos/ai-engineering-fluency --skill validate-model-pricing -a claude-code`. Or copy the skill folder (.claude/skills/validate-model-pricing in rajbos/ai-engineering-fluency) into .claude/skills/validate-model-pricing in your project. Claude Code loads it when a task matches its description.
How do I install Validate Model Pricing in Codex?
Run `npx skills add rajbos/ai-engineering-fluency --skill validate-model-pricing -a codex`. Or copy the skill folder (.claude/skills/validate-model-pricing in rajbos/ai-engineering-fluency) into .agents/skills/validate-model-pricing in your project. Codex loads it when a task matches its description.
Can I use Validate Model Pricing in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add rajbos/ai-engineering-fluency --skill validate-model-pricing -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/validate-model-pricing, .gemini/skills/validate-model-pricing, .github/skills/validate-model-pricing and .opencode/skills/validate-model-pricing in your project.
What does Validate Model Pricing need to run?
Going by SKILL.md and its folder, Validate Model Pricing needs the command-line tools its instructions call (node). Our summary lists: Node.js.
Does Validate Model Pricing access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Validate Model Pricing safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Validate Model Pricing use?
Validate Model Pricing is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Validate Model Pricing use?
About 1.2k tokens (SKILL.md is roughly 4.6k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Validate Model Pricing?
Skills that share tags, products or a category with Validate Model Pricing: Vercel Composition Patterns (supabase/supabase, 111k stars), Finishing a Development Branch (obra/superpowers, 297k stars), Typescript Advanced Types (rolling-scopes/rsschool-app, 10k stars) and PR Babysitter (openinterpreter/openinterpreter, 69k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Validate Model Pricing?
rajbos (a GitHub user) maintains it in rajbos/ai-engineering-fluency, which has 116 GitHub stars. The repository holds 21 skills in this directory. The repository was last updated on October 9, 2026.
Source: rajbos/ai-engineering-fluency on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.