cost

A command that calculates a reconciled estimate of API-equivalent cost for a completed Whats.Going.On. audit.

In plain words
What is it for?
It is for producing a read-only cost estimate and saving the result with the audit records.
Why use it?
It keeps cost calculations tied to the audit's recorded platform and avoids guessing when usage data is missing or unsupported.

Command

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add commands/wgo-audit/code/cost
Clone the repo
git clone --depth 1 https://github.com/wgo-audit/code
Per session 21 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 491 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00021 $0.00491
Opus 5 $0.00010 $0.00246
Sonnet 5 $0.00004 $0.00098
Haiku 4.5 $0.00002 $0.00049

Measured yesterday against content hash ac2ad0208264, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

cost scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured yesterday.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

commands/cost.md · 47 lines

What it actually says

/cost

Invoke this as wgo:cost in Codex, /wgo:cost in Claude, or /wgo-cost in OpenCode.

Load and use the WGO skill. Resolve the newest dated audit root with its references/common/audit-root.md, then read the audit platform recorded in audit-brief.md and run exactly one matching workflow:

  • Codex: references/common/cost-estimation.md;
  • Claude: references/common/cost-estimation-claude.md; or
  • OpenCode: references/common/cost-estimation-opencode.md.

Do not inspect a provider's session store or apply its usage schema to an audit recorded on another platform. If the platform is missing, ambiguous, or unsupported, write an Unreconciled cost control naming that limitation rather than guessing.

This is a read-only analysis of accessible provider-native session records that writes <audit-root>/controls/cost-estimate.md and the alias-only <audit-root>/controls/cost-calculation.json. Keep provider-native manifests and independent pass files under tmp_debug/wgo-cost/<audit-id>/, outside the audit root. Then update <audit-root>/manifest.json at execution.costEstimate with the result's exact total or explicitly labeled unreconciled subtotal. Do not install a package, invoke ccusage, add a helper program, or use an OS-specific binary. The active-platform coordinator discovers the audit descendants from recorded collaboration and task-lifecycle provenance, freezes the manifest before any calculation, and runs exactly two independent calculations over that unchanged manifest using the worker configuration in the selected provider workflow. If an earlier immutable manifest is unreconciled because of a demonstrated provider-schema adapter error, preserve it and create the workflow's versioned repair manifest and matching result files. Never identify an included session solely by date, CWD, folder, or model; those may corroborate recorded provenance only. After every calculation or refresh, follow references/templates/cost-estimate-template.md to replace the manifest cost summary and validate manifest.json again.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. yesterday First seen · 47 lines · 21 tokens per session scan A ac2ad0208264

Subscribe to this mod's changes

cost is a command published in the GitHub repository wgo-audit/code (2 stars, last pushed 8d ago), licensed MIT. It adds 21 tokens to every session and 491 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.