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 agents/getreka/reka/feature-buildergit clone --depth 1 https://github.com/getreka/rekaWhat 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 | $0.00428 |
| Opus 5 | $0.00022 | $0.00214 |
| Sonnet 5 | $0.00009 | $0.00086 |
| Haiku 4.5 | $0.00004 | $0.00043 |
Grade A, and why
feature-builder 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.
The source is not reproduced here
No licence file
A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.
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.
- yesterday First seen · 48 lines · 43 tokens per session scan A fe4403429a5a
feature-builder is an agent published in the GitHub repository getreka/reka (1 stars, last pushed 2mo ago), with no licence file. It adds 43 tokens to every session and 428 once invoked, about $0.0002 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.
Other agents, from other repositories
plastic-faux-advisor
The imitation advisor: an ordinary model carrying the frontier reasoning discipline below, so it reasons like the real advisor at a fraction of the cost. Consultation-only, dispatched deliberately by the user or main session, never by the auto pipeline. State TIER: S, M, or L in the brief, plus an EFFORT line. S: one…
plastic-enforcer
Use as the auto-mode orchestrator: it spins up the team, sequences the specialists, owns every gate, and runs the final review.
plastic-intent-curator
Use when completing or reviewing intents, reorganizing INDEX.md, or maintaining the intent store.
plastic-advisor
The real advisor: expensive, consultation-only, dispatched deliberately by the user or main session for the hardest reasoning, never by the auto pipeline. State TIER: S, M, or L in the brief, plus an EFFORT line. S: one bounded decision, verdict plus biggest risk. M: plan or plan-review, decision plus stepped plan…
plastic-brainstorming
Use for the Why-stage exploration of an active intent in auto mode: enrich the intent's Context and record its Decisions before the spec is written.
plastic-executor
Use for the Exec stage in auto mode: implement the actions, check off the checklist, and drive the test suite green.