
Skill
flag-release
automate LaunchDarkly feature flag rollouts
Description
Record an automated rollout for an existing LaunchDarkly flag that guards a pull request's change, so the change releases safely when the PR merges. Honors a stated release intent (release now / hold / notBefore / segment / prerequisite) and defers per-environment to the project's release policies. Use as the release step once the guarding flag exists and its code is wired. Keywords: record release, automated rollout, release policy, guarded rollout, staged rollout, simple vs policy, release intent, hold release, dark launch.
SKILL.md
Record a Flag's Automated Release
You're using a skill that takes an existing feature flag (created OFF) that guards a pull request's change, and records an automated rollout so the change releases safely once the PR merges — no human toggling a flag. It defers per-environment to the team's release policies and honors any human-stated release intent.
This is the release step of the PR flag workflow, and it's deliberately atomic:
| Step | Owned by |
|---|---|
| Decide whether to flag | should-flag-change (advisory) |
| Create the flag + wire the code | launchdarkly-flag-create |
| Record the release | this skill |
By the time this skill runs, the flag exists (OFF) and the guarding code is wired and pushed. This skill only records the rollout — it never creates flags or edits code. It can be driven directly by an automation harness, or as the final step of the flag-and-release-change orchestrator.
The deploy is not the release. The merge ships the control path (flag OFF); the release is the flag operation this rollout performs afterward, governed by the environment's policy.
Honoring a hold is the one thing you must get right. There is no "hold" release type, and
policyis NOT a manual gate. On merge,policyautomatically performs the environment's release (immediate, progressive, or guarded) with no human promotion step — a guarded rollout still starts on its own the moment the PR merges. So recording a held environment aspolicydoes not hold it; it releases it on merge, before anynotBeforedate. The only way to hold an environment is to omit it from theenvironmentsarray entirely, which leaves the flag OFF there. If the user wants an environment held (or not released until a date), exclude it from the call and report it as held. When in doubt, omit.
Prerequisites
- The remotely hosted LaunchDarkly MCP server.
- The guarding flag already exists in LaunchDarkly, created OFF, with the agreed key/tags.
- A pull-request reference (
repoFullName+prNumber, orprUrl) so the rollout binds to the right merge.
MCP tools this skill uses:
create-automated-rollout-config— record the rollout for the flag against the PR (the deliverable)match-release-policies— resolve which release policy governs each environment (call before proposing the plan)list-release-policies— see the project's release policies and the metrics they auto-attachget-flag— confirm the flag exists and is OFF before recording
Full release model — simple vs policy, precedence, previewing, prerequisites, metric adequacy: references/auto-release.md.
Plan Phase
Record nothing in this phase.
- Confirm the flag.
get-flagto verify the guarding flag exists and is OFF. If it doesn't exist yet, stop — creation islaunchdarkly-flag-create's job, and recording a rollout for a missing flag fails confusingly. - Pick the target environments. Use the environments named by the user or harness. Don't hardcode a set — a given change can't always release to every environment. If none are named, enumerate the project's real keys and confirm the set rather than assuming.
- Preview each environment's policy. Call
match-release-policies(byflagKey+environmentKey) to resolve, deterministically, what apolicyrelease will do per environment —winningReleaseMethod(immediate / progressive / guarded / none). Don't reason about policy scope by hand. For a guarded winner, check the auto-attached metrics can actually compare this change (see the metric-adequacy note in references/auto-release.md). - Capture the human's release intent. Ask (briefly, only if not already stated): release on merge, hold (recorded but not released yet), or wait until a
notBeforedate? A cohort/segment to target first? A prerequisite parent flag this must not precede? Intent sits above the policy in precedence and is honored or explicitly held — never silently dropped. - Present the per-environment plan and stop. For each environment, state either the
releaseTypeit will be recorded with (simple/policy, and what that does on merge) or that it will be held — omitted from the recorded config so the flag stays OFF there — with the reason. Wait for confirmation; revise on feedback.
Implement Phase
Only after confirmation:
- Sort every target environment into exactly one bucket — RELEASE or HOLD. Do this before you build the call. There is no third bucket, and
releaseTypedoes not create one.Bucket Meaning What goes in the call RELEASE Goes live on merge — now, or per its policy Add { environmentKey, releaseType }to theenvironmentsarrayHOLD Not yet — waiting on a date, sign-off, segment, or parent flag Nothing. Leave it out of environmentsentirely; name it as held in your reportreleaseType(simplevspolicy) only chooses how a RELEASE environment goes live — it never holds one. Both release on merge:simpleservestrueimmediately;policyruns that environment's policy (immediate / progressive / guarded) automatically, with no human promotion step. "policydefers to the policy" — not to you, and not until a date. Do not reach forpolicyto park a held environment: it ships that environment on merge, before anynotBefore. The only encoding of a hold is absence from the array. - Build
environmentsfrom the RELEASE bucket only — then read the keys back. The array must contain every RELEASE environment and no HOLD environment. Before you send the call, scan theenvironmentKeys in the array: if any environment you're holding appears there, delete that entry. The call has no field for a date or a hold — if you catch yourself wanting to addholdUntil,notBefore, orholdto an entry (or to keep it aspolicy"so it waits"), that is the signal the environment is HOLD: drop the entry, don't invent a field. The date and reason go in your report, not the call.
Worked example — "release staging on merge, hold production until 2026-09-01": staging is RELEASE, production is HOLD.{ "projectKey": "default", "flagKey": "new-checkout-flow", "environments": [{ "environmentKey": "staging", "releaseType": "simple" }], "repoFullName": "acme/storefront", "prNumber": 482 }productionappears nowhere in the call. You report it held until 2026-09-01, with the reason (legal sign-off). Fail closed: if an environment's intent is unclear, it's HOLD, not RELEASE. - Record the rollout. Call
create-automated-rollout-configwithprojectKey,flagKey, the RELEASE-onlyenvironmentsarray, and the PR reference. If a prerequisite parent flag was agreed, wire it if the MCP surface supports it; otherwise report it as a manual step. Details: references/auto-release.md. - Verify. The call returns
created,config_id, and the normalized per-environment plan — recordconfig_id. Report only what you verified; flag anything you couldn't confirm rather than asserting it. - Report the per-environment release plan +
config_id; what was held (and why) versus what releases on merge; and what happens on merge (e.g. "production resolves policy X → guarded rollout on merge; staging serves true immediately; production held until 2026-08-01 per intent").
Edge Cases
| Situation | Action |
|---|---|
| Flag doesn't exist yet | Stop — creation is launchdarkly-flag-create. Recording a rollout for a missing flag fails confusingly. |
| A rollout config already exists for this flag + PR | Don't record a second one — a duplicate confuses the scheduler. Point the user at the existing config to change the plan. |
| Registering before the PR exists | simple envs work without a PR, but policy envs need repoFullName/prNumber to trigger on merge. Prefer recording after the PR is open; if you record early, say policy won't fire until the PR is wired. |
| No release policy matches an env | policy falls back to defaults (often immediate). Tell the user; offer simple, or point at release-policy setup. |
User wants to hold, or set a notBefore date | Skip the releasing plan for those environments; report them as held with the reason. Never silently release against stated intent. |
| Change depends on a parent flag not yet live | Couple them with a prerequisite (set it if the MCP surface supports it); otherwise report the coupling as a required manual step. Don't let this flag release before its parent. |
A policy env resolves to guarded but has no relevant metric | Say so — a guarded rollout with no meaningful metric guards nothing. Recommend simple, or point at metric setup. |
What NOT to Do
- Don't create the flag or edit code — that's
launchdarkly-flag-create. This skill only records the release. - Don't turn the flag on yourself, or toggle it after recording the config. The rollout owns that; double-toggling causes audit noise and confuses the scheduler.
- Don't skip
match-release-policies. Proposingpolicywithout knowing what it resolves to is guessing. - Don't silently release against a stated hold/
notBefore. Honor intent or hold — never drop it. - Don't handle or print credentials. Access is injected by the environment.
References
- references/auto-release.md: the automated-rollout / release-policy model,
simplevspolicy, precedence (intent → override → policy → default), previewing, prerequisites, metric adequacy. (Core of this skill.) launchdarkly-guarded-rollout: for a bespoke rollout no policy expresses — set that env tosimplehere and drive the guarded rollout by hand after merge.
More skills from the ai-tooling repository
View all 48 skillsagent-graphs
create and manage agent graphs
Jul 28AgentsArchitectureLaunchDarklyMulti-Agentaiconfig-agent-graphs
manage agent graphs
May 22AgentsArchitectureaiconfig-ai-metrics
manage built-in AI metrics
May 22AnalyticsLaunchDarklyMetricsaiconfig-create
redirect to configs-create skill
May 22LaunchDarklyReferenceaiconfig-custom-metrics
configure custom metrics in LaunchDarkly
May 22AnalyticsFeature FlagsLaunchDarklyaiconfig-migrate
redirect to migrate skill
May 22Reference
More from LaunchDarkly
View publisheraiconfig-online-evals
run online evaluations
ai-tooling
May 22EvalsLaunchDarklyTestingaiconfig-projects
manage AI configuration projects
ai-tooling
May 22ConfigurationLaunchDarklyaiconfig-snippets
manage AI configuration snippets
ai-tooling
May 22ConfigurationLaunchDarklyaiconfig-targeting
configure LaunchDarkly targeting rules
ai-tooling
May 22ConfigurationFeature FlagsLaunchDarklyaiconfig-tools
redirect to tools skill
ai-tooling
May 22LaunchDarklyReferenceaiconfig-update
redirect to configs-update skill
ai-tooling
May 22LaunchDarklyReference