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 agentmods add skills/sliamh11/deus/add-codexnpx skills add sliamh11/Deus --skill add-codexgit clone --depth 1 https://github.com/sliamh11/DeusWhat 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 | $0.00043 | $0.02153 |
| Opus 5 | $0.00022 | $0.01077 |
| Sonnet 5 | $0.00009 | $0.00431 |
| Haiku 4.5 | $0.00004 | $0.00215 |
Grade C, and why
add-codex scanned grade C with 2 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 3d 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.
Harvests environment variableshighData exfiltration
Enumerating or grepping the environment for keys collects credentials unrelated to what the mod says it does.
### Collect the API key Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
curl -s -H "Authorization: Bearer $(grep OPENAI_API_KEY .env | cut -d= -f2)" \ How it starts
The opening of the file, as written. The whole thing — 271 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Add OpenAI/Codex Backend
This skill configures OpenAI/Codex as a backend for Deus. Two independent modes:
- Service backend (
DEUS_AGENT_BACKEND=openai) — container agents use the OpenAI Responses API for background message handling - CLI sessions (
deus codex) — foreground interactive sessions using thecodexCLI binary
You can enable one or both. The Claude backend remains the default until explicitly switched.
IMPORTANT: This skill writes environment variables to .env and syncs them to data/env/env at runtime. It does not modify source code or require a rebuild.
Phase 1: Pre-flight
Check if already configured
Check if OpenAI/Codex is already set up:
grep -q 'OPENAI_API_KEY=.' .env 2>/dev/null && echo "API key found" || echo "No API key"
deus backend
If both show valid config, skip to Phase 5 (Verify).
Ask scope
AskUserQuestion: How do you want to use OpenAI/Codex?
- Service backend — container agents use OpenAI for message handling (replaces Claude as default backend)
- CLI only — use
deus codexfor interactive sessions (Claude stays as service backend) - Both — service backend + CLI sessions
Recovery: If you're unsure, start with CLI only (option 2). You can switch the service backend later with
deus backend set codex.
Phase 2: API Key
Check for existing key
grep 'OPENAI_API_KEY' .env 2>/dev/null
If a key is already set and valid, skip to Phase 3.
Collect the API key
AskUserQuestion: Do you have an OpenAI API key? If not, create one at https://platform.openai.com/api-keys — you need a key with API access (not just ChatGPT Plus).
Wait for the user to provide their key.
Write to .env
Append or update OPENAI_API_KEY in .env:
# Update or append OPENAI_API_KEY:
if grep -q '^OPENAI_API_KEY=' .env; then
tmpf=$(mktemp) && sed 's/^OPENAI_API_KEY=.*/OPENAI_API_KEY=<their-key>/' .env > "$tmpf" && mv "$tmpf" .env
else
echo 'OPENAI_API_KEY=<their-key>' >> .env
fi
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.
- 3d ago First seen · 271 lines · 43 tokens per session scan C 95dea5f78f67
add-codex is a skill published in the GitHub repository sliamh11/Deus (51 stars, last pushed 9d ago), licensed MIT. It adds 43 tokens to every session and 2,153 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it C with 2 findings (harvests environment variables, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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