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 harness/harness-skills --skill cleanup-feature-flagsgit clone --depth 1 https://github.com/harness/harness-skillsWrote 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/harness/harness-skills/cleanup-feature-flags)<a href="https://agentmods.dev/skills/harness/harness-skills/cleanup-feature-flags"><img src="https://agentmods.dev/badge/skills/harness/harness-skills/cleanup-feature-flags/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/harness/harness-skills/cleanup-feature-flags"><img src="https://agentmods.dev/badge/skills/harness/harness-skills/cleanup-feature-flags.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00112 | $0.02176 |
| Opus 5.5 | $0.00045 | $0.00870 |
| Sonnet 5.5 | $0.00022 | $0.00435 |
| Haiku 4.5 | $0.00011 | $0.00218 |
Grade A, and why
cleanup-feature-flags 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.
How it starts
The opening of the file, as written. The whole thing — 122 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Cleanup Feature Flags
Remove one launched FME flag from application code and keep the branch FME serves today. The work ends with a PR. FME is read-only here; archive happens later in manage-flag-lifecycle.
Related: discover-feature-flags finds candidates (stale audit); manage-flag-lifecycle archives after the change deploys.
Tools
Works through the Harness MCP server or the Harness CLI; names are from tool-map.md.
| Operation | MCP | CLI |
|---|---|---|
| List environments | harness_list · fme_environment · compact: false |
harness list fme_environment --json |
| Get flag | harness_get · fme_feature_flag · params: { feature_flag_name } |
harness get feature_flag <flag> --json |
| List flag definitions | harness_list · fme_feature_flag_definition · params: { feature_flag_name } · filters: { offset: 0, limit: 100 } · compact: false |
harness list feature_flag:definition <flag> --json |
| List experiments | harness_list · fme_experiment · filters: { parent_type: "FEATURE_FLAG", parent_name, status: ["ACTIVE", "PAUSED"], offset: 0, limit: 100 } (apply pagination completeness checks) · compact: false |
harness list experiment --parent-type FEATURE_FLAG --parent-name <flag> --status ACTIVE --json, then again with --status PAUSED |
Instructions
Load readiness.md before giving a verdict. Load sdk-patterns.md before searching code.
Phase 1: Establish scope
Follow scope-establishment.md. Fully paginate List environments per pagination before confirming the critical environments: by default those with isProduction, plus any the user adds. The critical set must be non-empty and explicitly confirmed back to the user before any later phase. If no environment is marked isProduction and the user hasn't named any, STOP and ask which environments are critical — do not treat an empty critical set as vacuously ready.
What ships with it
1 file 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.
- yesterday Changed · +1 lines 0d860d26ac25
- 9d ago Changed · -163 lines · +15 tokens per session ff069f38a90e
- 10d ago First seen · 284 lines · 97 tokens per session scan A bd297f168e5f
cleanup-feature-flags is a skill published in the GitHub repository harness/harness-skills (117 stars, last pushed yesterday), licensed Apache-2.0. It adds 112 tokens to every session and 2,176 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 2026-10-06.
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