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 Morningstar202604/awesome-skillkit --skill feature-flags-architectgit clone --depth 1 https://github.com/Morningstar202604/awesome-skillkitWrote 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/morningstar202604/awesome-skillkit/feature-flags-architect)<a href="https://agentmods.dev/skills/morningstar202604/awesome-skillkit/feature-flags-architect"><img src="https://agentmods.dev/badge/skills/morningstar202604/awesome-skillkit/feature-flags-architect/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/morningstar202604/awesome-skillkit/feature-flags-architect"><img src="https://agentmods.dev/badge/skills/morningstar202604/awesome-skillkit/feature-flags-architect.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 | $0.00121 | $0.02496 |
| Opus 5 | $0.00060 | $0.01248 |
| Sonnet 5 | $0.00024 | $0.00499 |
| Haiku 4.5 | $0.00012 | $0.00250 |
Grade A, and why
feature-flags-architect 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 9d 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 — 224 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Feature Flags Architect
End-to-end discipline for feature flags: classify them, ship them, ramp them, and retire them. Most teams treat flags as throwaway if-statements; this skill treats them as a controlled lifecycle with measurable debt.
When to use
- Adding a new flag and need a rollout plan
- Auditing a codebase for stale or orphaned flags
- Choosing a flag provider (LaunchDarkly vs GrowthBook vs Statsig vs Unleash vs Flipt vs build-your-own)
- Designing a kill-switch path for a risky launch
- Cleaning up flag debt before a release freeze
- Reviewing whether a feature should ship behind a flag at all
Core principle: flags are a lifecycle, not an if
request → design → ship → ramp → cleanup → archive
Flags that skip cleanup become debt: dead branches, stale defaults, untested code paths, unbounded blast radius. The three scripts in this skill enforce the lifecycle.
Quick start
# 1. Audit the repo for flag debt
python scripts/flag_debt_scanner.py --repo . --max-age-days 90
# 2. Plan a progressive rollout for a new flag
python scripts/rollout_planner.py --population 100000 --target-percent 100 --duration-days 14 --strategy ring
# 3. Verify every flag has a documented kill switch
python scripts/kill_switch_audit.py --repo . --flag-doc docs/feature-flags.md
The 4 flag types (taxonomy)
Different flag types have different lifespans and ownership. Misclassifying creates debt.
| Type | Purpose | Typical lifespan | Owner | Cleanup trigger |
|---|---|---|---|---|
| Release | Hide unfinished features in production | days–weeks | Eng | 100% rollout reached |
| Experiment | A/B test variants | weeks | Product/Marketing | Test concluded; winner picked |
| Operational | Circuit breakers, perf toggles, kill switches | months–years | Eng/SRE | Replaced by autoscaling/feature retirement |
| Permission | Entitlements per user/account/plan | years (permanent) | Product | Plan/role removed |
Only Release and Experiment flags should be on a debt-scanner watchlist. Operational and Permission flags are by design long-lived. See references/flag_taxonomy.md for decision tree.
What ships with it
8 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.
- assets/flag_request_template.md 1.7 KB
- references/flag_lifecycle.md 5.7 KB
- references/flag_taxonomy.md 4.4 KB
- references/provider_comparison.md 5.0 KB
- references/rollout_strategies.md 4.9 KB
- scripts/flag_debt_scanner.py 4.7 KB runs code
- scripts/kill_switch_audit.py 4.9 KB runs code
- scripts/rollout_planner.py 4.4 KB runs code
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.
- 9d ago First seen · 224 lines · 121 tokens per session scan A f403072703a5
feature-flags-architect is a skill published in the GitHub repository Morningstar202604/awesome-skillkit (1 stars, last pushed today), licensed Apache-2.0. It adds 121 tokens to every session and 2,496 once invoked, about $0.0006 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 skills, from other repositories
feature-flags-architect
Use when adding, retiring, or auditing feature flags. Triggers on "add a flag", "ship behind a flag", "rollout plan", "kill switch", "stale flags", "flag debt", "LaunchDarkly", "GrowthBook", "Statsig", "Unleash", "Flipt", or any progressive-delivery question. Ships flag debt scanner, rollout planner, and kill-switch…
Feature Flag Testing
Testing feature flag implementations including flag evaluation, gradual rollout verification, fallback behavior, and flag cleanup detection.
feature-flags
Feature flag strategies, rollout patterns, kill switches and flag lifecycle management.
feature-flag-management
Manage the full feature-flag lifecycle — create, roll out, measure, and clean up — across release, ops/kill-switch, experiment, and permission flag types with progressive delivery.
feature-flag-strategy
Use feature flags to decouple deploy from release, then clean them up. Invoke when shipping any risky change, a gradual rollout, or a kill-switch.
k8s-deployment-rollout
A troubleshooting workflow for failed Kubernetes Deployment releases and rolling updates that become stuck. Kubernetes is a system for running and managing containers.