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.
npx skills add monarchjuno/tradingcodex --skill tcx-braingit clone --depth 1 https://github.com/monarchjuno/tradingcodexWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/monarchjuno/tradingcodex/tcx-brain)<a href="https://agentmods.dev/skills/monarchjuno/tradingcodex/tcx-brain"><img src="https://agentmods.dev/badge/skills/monarchjuno/tradingcodex/tcx-brain/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/monarchjuno/tradingcodex/tcx-brain"><img src="https://agentmods.dev/badge/skills/monarchjuno/tradingcodex/tcx-brain.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00096 | $0.01781 |
| Opus 5.5 | $0.00038 | $0.00712 |
| Sonnet 5.5 | $0.00019 | $0.00356 |
| Haiku 4.5 | $0.00010 | $0.00178 |
Grade A, and why
tcx-brain 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 1mo ago.
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.
How it starts
The opening of the file, as written. The whole thing — 149 lines — stays where its author put it; the contents beside it link to each section on GitHub.
TCX Brain
Manage the complete Investment Brain lifecycle through one user entrypoint. A Brain shapes Head Manager's inquiry and interpretation; it is not a Strategy, role roster, workflow, memory store, policy package, or execution extension.
$tcx-brain manages Brains. It never selects one for analysis. A native
analysis still requires one exact active $investment-brain-* id, either as a
plain invocation or a Markdown link whose label and target match the projected
workspace skill. Repeated references to the same id are deduplicated; distinct
multiple ids fail closed.
Read bundle-contract.md before creating, revising, or deleting a user-owned source bundle.
Action Model
Keep the two managed layers distinct:
- Source actions create, inspect, revise, validate, or explicitly delete a
user-owned workspace-local bundle below
investment-brains/. - Plugin actions list, inspect, install, update, activate, deactivate, roll
back, or remove registry-managed immutable versions through the canonical
manage_investment_brainMCP service.
remove is the managed delete operation: it removes the Head Manager
projection and marks the plugin removed while retaining immutable versions for
run provenance. It does not delete a user-owned source directory. A source
deletion is a separate, explicitly named action.
Admission
Natural-language requests may create or revise a user-owned source below
investment-brains/, then run read-only validation. list, inspect, and
validate require no lifecycle proof. Use the normal trading-research
profile for both source and lifecycle work.
Require $tcx-brain on the first meaningful line of a fresh root turn only for
managed install, update, activate, deactivate, rollback, or remove.
Do not combine it with $tcx-build, $tcx-wiki, $tcx-strategy, or an order
marker. The marker grants only the matching current-turn lifecycle service
call. Plan mode and subagents cannot perform managed lifecycle mutations.
What ships with it
2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 1mo ago First seen · 149 lines · 96 tokens per session scan A 883242ca9e96
tcx-brain is a skill published in the GitHub repository monarchjuno/tradingcodex (374 stars, last pushed 2mo ago), licensed Apache-2.0. It adds 96 tokens to every session and 1,781 once invoked, about $0.0004 per session on Opus 5.5. 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 2026-08-30.
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