Investor Report
revfactory/harness-100
A full pipeline that systematizes investor reports into financial performance analysis, KPI dashboard, market trends, strategy updates, and risk disclosures.
Turn whitepapers, protocol specs, and public documentation into Foundry property tests.
Install Foundry Spec Properties
$ npx skills add aviggiano/security --skill foundry-spec-properties -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install aviggiano/security foundry-spec-properties --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/aviggiano/security.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/foundry-spec-properties .claude/skills/foundry-spec-properties && 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 "foundry-spec-properties" agent skill from https://github.com/aviggiano/security/tree/main/skills/foundry-spec-properties into .claude/skills/foundry-spec-properties/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "foundry-spec-properties", 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/aviggiano/security/tree/main/skills/foundry-spec-propertiesType 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 aviggiano/security --skill foundry-spec-properties -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install aviggiano/security foundry-spec-properties --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/aviggiano/security.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/foundry-spec-properties .agents/skills/foundry-spec-properties && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "foundry-spec-properties" agent skill from https://github.com/aviggiano/security/tree/main/skills/foundry-spec-properties into .agents/skills/foundry-spec-properties/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "foundry-spec-properties", 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 aviggiano/security --skill foundry-spec-properties -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install aviggiano/security foundry-spec-properties --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/aviggiano/security.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/foundry-spec-properties .cursor/skills/foundry-spec-properties && 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 "foundry-spec-properties" agent skill from https://github.com/aviggiano/security/tree/main/skills/foundry-spec-properties into .cursor/skills/foundry-spec-properties/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "foundry-spec-properties", 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/aviggiano/security.git --path skills/foundry-spec-properties--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 aviggiano/security --skill foundry-spec-properties -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install aviggiano/security foundry-spec-properties --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/aviggiano/security.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/foundry-spec-properties .gemini/skills/foundry-spec-properties && 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 "foundry-spec-properties" agent skill from https://github.com/aviggiano/security/tree/main/skills/foundry-spec-properties into .gemini/skills/foundry-spec-properties/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "foundry-spec-properties", 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 aviggiano/security foundry-spec-propertiesInstalls 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 aviggiano/security --skill foundry-spec-properties -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/aviggiano/security.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/foundry-spec-properties .github/skills/foundry-spec-properties && 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 "foundry-spec-properties" agent skill from https://github.com/aviggiano/security/tree/main/skills/foundry-spec-properties into .github/skills/foundry-spec-properties/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "foundry-spec-properties", 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 aviggiano/security --skill foundry-spec-properties -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install aviggiano/security foundry-spec-properties --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/aviggiano/security.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/foundry-spec-properties .opencode/skills/foundry-spec-properties && 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 "foundry-spec-properties" agent skill from https://github.com/aviggiano/security/tree/main/skills/foundry-spec-properties into .opencode/skills/foundry-spec-properties/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "foundry-spec-properties", 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
foundry-spec-properties- GitHub stars
- 144
- Token cost
- ~489 tokens
- SKILL.md length
- 209 words
- Files
- 2
- Skills in repo
- 10
- Repo updated
- First seen
- Licence
- MIT
At a glance
Turn whitepapers, protocol specs, and public documentation into Foundry property tests.
- Codex needs to derive invariants
- SKILL.md covers Source Handling, Deriving Properties, TDD Policy and Validation
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
- Conservation rules
What it does
Foundry Spec Properties is an agent skill from aviggiano/security. Turn whitepapers, protocol specs, and public documentation into Foundry property tests. Use when Codex needs to derive invariants, conservation rules, atomicity rules, priority rules, price-view behavior, or accounting properties from external specs without weakening tests that expose production mismatches.
Its SKILL.md is about 490 tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files (for example `agents/openai.yaml`).
It sits in Documents & Office, covering Report writing and Accounting and bookkeeping. The repository describes itself as: Security Reviews and Audit Checklists. The licence is MIT.
When your agent uses it
- Codex needs to derive invariants
- Conservation rules
- Atomicity rules
- Price-view behavior
Example prompts
- “/foundry-spec-properties”
What it can do on your machine
Read from SKILL.md and the folder at commit e18ce7d. 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
Foundry Spec Properties loads about 489 tokens when it runs. Until then it costs about 83 tokens; SKILL.md has 209 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 aviggiano/security at commit e18ce7d, republished under its MIT licence (© aviggiano). 209 words, ~489 tokens.
Download SKILL.mdSave it as
.claude/skills/foundry-spec-properties/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.- name
- foundry-spec-properties
- description
- Turn whitepapers, protocol specs, and public documentation into Foundry property tests. Use when Codex needs to derive invariants, conservation rules, atomicity rules, priority rules, price-view behavior, or accounting properties from external specs without weakening tests that expose production mismatches.
Foundry Spec Properties
Source Handling
Use the current spec source the user names. If it is a URL, fetch or browse it when current access is required. Cite or record the exact source used in the work summary when the property depends on a spec claim.
Separate spec properties from unit/fuzz mirrors. Use a clear directory such as:
test/foundry/property/<spec-name>/
test/foundry/properties/Follow the repository's existing directory convention when one exists.
Deriving Properties
Look for properties that remain true across many inputs:
- conservation of balances, reserves, shares, or locked amounts
- quote/preview functions matching execution
- batch atomicity and required-action rollback
- price priority, time priority, or path priority
- price bucket/view consistency
- add/remove or deposit/withdraw roundtrips
- permission and lifecycle transitions
- no accidental balance creation or loss
Prefer public semantics over implementation-specific mechanisms.
TDD Policy
Add the property test first. If it fails, do not fix production or relax the property in the same breath. Report whether the failure appears to be:
- invalid harness setup
- reference/spec modeling issue
- production/spec mismatch
- ambiguous spec language
Preserve strict equality unless the spec states a tolerance. Rounding-related failures should remain visible unless the user explicitly decides otherwise.
Validation
Run the focused property file with enough verbosity to capture the counterexample. Then run the property subtree or full Foundry suite as appropriate.
© aviggiano, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
SKILL.md and 1 other file in skills/foundry-spec-properties of aviggiano/security.
- SKILL.md
- agents/openai.yaml
Open the folder on GitHubat commit e18ce7d
Compare with similar skills
Foundry Spec Properties 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 |
|---|---|---|---|---|---|---|
| Foundry Spec Properties this skillaviggiano/security | 144 | — | ~489 | Automated safety check: Pass | MIT | |
| Investor Reportrevfactory/harness-100 | 1.3k | — | ~1.7k | Automated safety check: Pass | Apache-2.0 | |
| Ar AgingWellApp-ai/Well | 345 | — | ~532 | Automated safety check: Pass | MIT | |
| Beancount Reconcilebex-co/beancount-io | 296 | — | ~4.1k | Automated safety check: Pass | MIT | |
| Receipts To Expensesskrun-dev/skrun | 210 | — | ~1.1k | Automated safety check: Pass | MIT | |
| Lbo Modelw95/awesome-claude-corporate-skills | 244 | 1 repos | ~3k | Automated safety check: Pass | MIT |
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Categories
Questions about Foundry Spec Properties
What does Foundry Spec Properties do?
Turn whitepapers, protocol specs, and public documentation into Foundry property tests. Foundry Spec Properties is an agent skill from aviggiano/security. Turn whitepapers, protocol specs, and public documentation into Foundry property tests.
When should I use Foundry Spec Properties?
Foundry Spec Properties fits situations like: Codex needs to derive invariants; conservation rules; atomicity rules; price-view behavior.
How do I install Foundry Spec Properties in Claude Code?
Run `npx skills add aviggiano/security --skill foundry-spec-properties -a claude-code`. Or copy the skill folder (skills/foundry-spec-properties in aviggiano/security) into .claude/skills/foundry-spec-properties in your project. Claude Code loads it when a task matches its description.
How do I install Foundry Spec Properties in Codex?
Run `npx skills add aviggiano/security --skill foundry-spec-properties -a codex`. Or copy the skill folder (skills/foundry-spec-properties in aviggiano/security) into .agents/skills/foundry-spec-properties in your project. Codex loads it when a task matches its description.
Can I use Foundry Spec Properties 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 aviggiano/security --skill foundry-spec-properties -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/foundry-spec-properties, .gemini/skills/foundry-spec-properties, .github/skills/foundry-spec-properties and .opencode/skills/foundry-spec-properties in your project.
What does Foundry Spec Properties need to run?
SKILL.md names no scripts, command-line tools or credentials: Foundry Spec Properties is instructions for the agent only.
Does Foundry Spec Properties 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 Foundry Spec Properties 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 Foundry Spec Properties use?
Foundry Spec Properties 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 Foundry Spec Properties use?
About 489 tokens (SKILL.md is roughly 2k 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 Foundry Spec Properties?
Skills that share tags, products or a category with Foundry Spec Properties: Investor Report (revfactory/harness-100, 1.3k stars), Ar Aging (WellApp-ai/Well, 345 stars), Beancount Reconcile (bex-co/beancount-io, 296 stars) and Receipts To Expenses (skrun-dev/skrun, 210 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Foundry Spec Properties?
aviggiano (a GitHub user) maintains it in aviggiano/security, which has 144 GitHub stars. The repository holds 10 skills in this directory. The repository was last updated on September 15, 2026.
Source: aviggiano/security on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.