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Agent skill

Auction First Price Shading

by lyndonkl in lyndonkl/claude

Computes the optimal shaded bid for a first-price sealed-bid auction given a true private value, an estimate of the number of competing bidders N, and a value-distribution assumption.

No licenceAuto-check passedBusiness, Finance & HR

Install Auction First Price Shading

skills CLI
$ npx skills add lyndonkl/claude --skill auction-first-price-shading -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install lyndonkl/claude auction-first-price-shading --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/lyndonkl/claude.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/auction-first-price-shading .claude/skills/auction-first-price-shading && rm -rf skills-src

Use ~/.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/

Facts

Skill name
auction-first-price-shading
GitHub stars
164
Token cost
~3.4k tokens
SKILL.md length
1,428 words
Files
4
Skills in repo
12
Repo updated
First seen
Licence
None found

At a glance

Computes the optimal shaded bid for a first-price sealed-bid auction given a true private value, an estimate of the number of competing bidders N, and a value-distribution assumption.

  • Works in 8 steps: (N-1)/N is a symmetric-equilibrium… → N is an estimate, not a datum. Most… → Clamp N to [1, 12]. Values below 1 are… → …
  • User mentions first-price auction bid
  • SKILL.md covers Table of Contents, Example, Workflow and Common Patterns, plus 2 more sections
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Auction First Price Shading is an agent skill from lyndonkl/claude. Computes the optimal shaded bid for a first-price sealed-bid auction given a true private value, an estimate of the number of competing bidders N, and a value-distribution assumption. Implements the (N-1)/N equilibrium shading rule for uniform private values, adjusts for log-normal or empirical value distributions, layers a risk-aversion adjustment, and caps output against the bidder's remaining budget. Domain-neutral auction theory reusable across fantasy sports (baseball FAAB, NBA/NHL waiver auctions)…

Its SKILL.md is about 3.4k tokens, which your agent loads only when the skill is triggered. The skill folder holds 5 other files (for example `resources/evaluators/rubric_auction_first_price_shading.json`, `resources/methodology.md` and `resources/template.md`).

It sits in Business, Finance & HR, covering Vendor and procurement management. The repository describes itself as: Agents, skills and anything else to use with claude.

When your agent uses it

  • User mentions first-price auction bid
  • Sealed bid shading
  • FAAB bid amount
  • Auction shading

Example prompts

  • “first-price auction bid”
  • “sealed bid shading”
  • “(N-1)/N”
  • “/auction-first-price-shading”

Workflow steps

8 steps, taken from the first numbered list in SKILL.md.

  1. (N-1)/N is a symmetric-equilibrium result, not a universal truth. It assumes all bidders use the same bidding function and draw values…
  2. N is an estimate, not a datum. Most callers do not know N exactly. Small errors in N matter little (the shade function is smooth), but…
  3. Clamp N to [1, 12]. Values below 1 are nonsense. Values above 12 rarely improve the bid materially (shade at N=12 is 0.917 vs. 0.875 at…
  4. Never bid above 0.9 x true_value. This is a hard cap. Even with heavy risk aversion or very large N, crossing 0.9 reduces expected surplus…
  5. Never bid above budget_remaining. The shaded bid is clamped to available budget. If the clamp binds, the output flag must say so — the…
  6. N = 1 is a corner case. With no competition, the dominant strategy is to bid the minimum increment (often 1 unit, sometimes 0). The skill…
  7. Risk aversion does not dominate the math. The adjustment shade' = shade + risk_aversion x (1 - shade) x 0.4 is bounded by the 0.4 scaling…
  8. This skill is domain-neutral. It knows nothing about baseball, prediction markets, or procurement. Downstream consumers (e.g…

What it can do on your machine

Read from SKILL.md and the folder at commit 4acc337. 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

    No scripts in the folder and no shell commands in SKILL.md.

    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

Auction First Price Shading loads about 3.4k tokens when it runs. Until then it costs about 226 tokens; SKILL.md has 1,428 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~226
When it runs · the whole SKILL.md, loaded when a task matches
~3.4k

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

Without a licence we can't republish the file, so here is its outline and opening line. It has 1,428 words (~3,354 tokens).

“Scenario: Domain-neutral sealed-bid auction. A bidder must submit a blind bid for an item whose private value to them is 28 units of budget currency. Six other bidders are expected to compete. Values across bidders look roughly uniform. The bidder…”

— opening of SKILL.md by lyndonkl
name
auction-first-price-shading

Read the full SKILL.md on GitHub

Files

SKILL.md and 3 other files in skills/auction-first-price-shading of lyndonkl/claude.

  • SKILL.md
  • resources/evaluators/rubric_auction_first_price_shading.json
  • resources/methodology.md
  • resources/template.md

Open the folder on GitHubat commit 4acc337

Compare with similar skills

Auction First Price Shading 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.

Auction First Price Shading compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Auction First Price Shading this skilllyndonkl/claude164—~3.4kAutomated safety check: PassNone
Serenity Alphahaskaomni/serenity-skill633—~2.6kAutomated safety check: PassMIT
Scorecard Matrixpnp/sharepoint-skills133—~1.9kAutomated safety check: PassMIT
Oma Imagefirst-fluke/oh-my-agent1.3k—~2kAutomated safety check: PassMIT
Buyer Job Intent Analysiselvisun/newsjack1.5k—~1.4kAutomated safety check: PassMIT
Master Builderibuilder/massing122—~2.6kAutomated safety check: PassMIT

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Categories

Questions about Auction First Price Shading

What does Auction First Price Shading do?

Computes the optimal shaded bid for a first-price sealed-bid auction given a true private value, an estimate of the number of competing bidders N, and a value-distribution assumption. Auction First Price Shading is an agent skill from lyndonkl/claude. Computes the optimal shaded bid for a first-price sealed-bid auction given a true private value, an estimate of the number of competing bidders N, and a value-distribution assumption.

When should I use Auction First Price Shading?

Auction First Price Shading fits situations like: user mentions first-price auction bid; sealed bid shading; FAAB bid amount; auction shading.

How do I install Auction First Price Shading in Claude Code?

Run `npx skills add lyndonkl/claude --skill auction-first-price-shading -a claude-code`. Or copy the skill folder (skills/auction-first-price-shading in lyndonkl/claude) into .claude/skills/auction-first-price-shading in your project. Claude Code loads it when a task matches its description.

How do I install Auction First Price Shading in Codex?

Run `npx skills add lyndonkl/claude --skill auction-first-price-shading -a codex`. Or copy the skill folder (skills/auction-first-price-shading in lyndonkl/claude) into .agents/skills/auction-first-price-shading in your project. Codex loads it when a task matches its description.

Can I use Auction First Price Shading 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 lyndonkl/claude --skill auction-first-price-shading -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/auction-first-price-shading, .gemini/skills/auction-first-price-shading, .github/skills/auction-first-price-shading and .opencode/skills/auction-first-price-shading in your project.

What does Auction First Price Shading need to run?

SKILL.md names no scripts, command-line tools or credentials: Auction First Price Shading is instructions for the agent only.

Does Auction First Price Shading 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 Auction First Price Shading 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 Auction First Price Shading use?

No licence was found for Auction First Price Shading or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.

How many tokens does Auction First Price Shading use?

About 3.4k tokens (SKILL.md is roughly 13k 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 Auction First Price Shading?

Skills that share tags, products or a category with Auction First Price Shading: Serenity Alpha (haskaomni/serenity-skill, 633 stars), Scorecard Matrix (pnp/sharepoint-skills, 133 stars), Oma Image (first-fluke/oh-my-agent, 1.3k stars) and Buyer Job Intent Analysis (elvisun/newsjack, 1.5k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Auction First Price Shading?

lyndonkl (a GitHub user) maintains it in lyndonkl/claude, which has 164 GitHub stars. The repository holds 12 skills in this directory. The repository was last updated on September 1, 2026.

Source: lyndonkl/claude on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.