implement

# Implement Implement the accepted outcome. Repair ordinary known defects directly. Use the existing intent; a clear edit needs no Plan first. Implement owns source changes and factual checks. Read changed paths from Git (`git status --porcelain`, `git diff --name-only <base>`), never from memory; `ao provenance manifest --root <repo>` with one `--include <path>` per declared path digests only the paths you declare and runs no Git. Copy check results from the command output. ## Rules that decide the result - **Fix the cause, not the oracle.** Never loosen an assertion, tolerance, golden, fixture or suppression, or substitute a mock or placeholder, to turn a check green; nor change what the check runs against: code that acts differently under test or CI, a newly silenced failure path, or a check made non-blocking or skipped. A check that fails against accepted behavior points at a product defect; changing what the check accepts is an acceptance change and needs caller authority. - **Find live consumers before editing.** Search the callers, readers, scripts, docs and tests of every edited function, type, path, format or message. For each one, state whether the change affects it and which check covers it. When retiring or renaming, consumers include installations, lookups and old-name invocations; preserve historical provenance. If the replaced interface never merged or shipped and every consumer update fits the scope, update them and delete the old version in the same change, with no alias or shim; otherwise keep the old version working or report it. - **Name discriminating checks.** A behavioral change preserves RED for the expected missing behavior: name the check that fails before the edit and passes after ([Test's proof rule](../test/SKILL.md#critical-constraints)), plus the check for each affected consumer. - **Report only what ran.** Give exact commands and results. List every check you did not or could not run as not run. Never call unrun work verified, fixed or green. Output can show as soon as a command runs, so keep secrets out when you build it: credentials stay in the environment, output that may carry tokens goes to a file, and only redacted excerpts are shown. When changing a public failure path, preserve its native failure signal and check that its recovery advice matches any work already performed. For uncertain write outcomes or unattended callers, use only the relevant checks in [Test's error recovery method](../test/references/error-recovery.md). For an accepted bounded shortcut, review feedback or a defect your change introduced, an authorized commit, history rewrite or merge conflict, dependency upgrade, removal, blocked operation, a decision read from another tool's state or your own uncertain write, use only the matching [change safety method](references/change-safety.md). These methods preserve existing authority; they grant no new operation. For authorized service operations, load only the relevant procedure from [operations methods](references/operations.md) (reliability, delivery, incident recovery, resilience, toil); ordinary edits owe no operations phase. ## Workflow 1. Read intent, acceptance, scope and repository boundaries before the first write; reuse loaded contracts. [RPI boundaries](../rpi/references/boundaries.md) apply when RPI is selected; caller-selected episode tracking follows the [session association reference](../agent-native/references/session-associations.md#work-to-session-associations). Note the revision and files already modified, staged or untracked; report only your own as changed, and ask the caller before editing one holding others' edits. 2. Carry the accepted behavior examples forward unchanged. Use repository domain names in symbols and tests; check observable outcomes through the relevant interface. Run the smallest applicable check before and after editing. Pure refactors, relocations or docs may have an honest green baseline. Prefer existing tests or small discriminating probes. 3. Make the smallest in-scope change. When repairing discovery or checks, preserve the consumer's existing input selection; fixing an error path does not authorize a wider scan. Use a negative control when exclusion matters. Check a representative change against existing constraints before bulk propagation, and the authored source set before broad regeneration. A scripted edit across files first confirms that each anchor matches exactly once; on zero or several matches, write nothing and re-derive it. Repair known failures directly and verify the exact result with a check; a repair does not start another review. A disproved assumption may change the approach within scope; use Plan only for consequential uncertainty. 4. Read the repository's actual check recipe, including instrumentation and environment, rather than reconstructing it from memory. Run targeted tests and lint/static checks before broad integration, and required full checks at integration. Reuse exact-input receipts only while source, tool and relevant environment match. Neither bypass required hooks nor replay a check just to rename its receipt. A required CI job's known failure is actionable before the run ends: repair it within scope, keep the failed subject's evidence and rerun affected checks. Pending jobs do not imply success. A new check, hook or lint rule counts once the aggregate command or CI runs it (a Git hook needs an install path; `.git/hooks` is not cloned) and it fails on a deliberate violation; else list it under `gaps` as not wired. Use a local server already on a port only if it provably serves this checkout; stop only processes you started. 5. Refactor while acceptance remains green. Inspect changed tests, fixtures, goldens, tolerances, suppressions and specification text against original intent before handoff. Reread that intent at its source, not a compacted summary, and check the whole delta against it, untracked files included. Remove leftovers of abandoned approaches, temporary probes (one shared marker lets a single search prove none remain) and files your checks made; list any path you cannot explain under `gaps` as a scope amendment. 6. Have the runtime derive actual changed paths and content identity. A delegated increment awaiting integration returns an exact commit or runtime-derived content digests, author context ID and check facts in the existing handoff. Copy that ID from the session, subagent or thread ID the runtime exposes, or label a caller-supplied one as supplied; otherwise report it as unknown, never made up. The integrating caller derives `subject-manifest.v1` (AgentOps schema [subject-manifest.v1.schema.json](https://github.com/boshu2/agentops/blob/main/schemas/subject-manifest.v1.schema.json), AgentOps source checkout only) over the complete final subject before judgment; an independently judged increment needs its own manifest. Do not generate both merely because work was delegated. Where the repository records AgentOps evidence bindings, also run `ao provenance evidence-orphans --root <repo-root>` with one `--changed <path>` per derived path (it is advisory), keep its actual output and refresh flagged bindings after repairs; without `ao`, list it under `not run`. 7. Return the handoff below, then stop. ## Handoff Keep full logs at their source; do not duplicate inventories or status documents. ```text changed: <runtime-derived paths>; identity: <commit or content digests> author: <runtime session/subagent/thread ID, "ID (supplied)" or "unknown">; when an integrator or fresh read follows checks: <exact command> -> <result>, one per line; before and after for a behavioral change not run: <check> -> <reason>; "none" only when every relevant check ran consumers: <file:line> -> <covering check, or "uncovered"> gaps: <missing or truncated evidence, known failures, scope amendments needed> cause: <defect repairs only: trigger -> mechanism -> symptom at file:line; sites left as follow-up> ``` Report an uncovered live consumer for a caller scope amendment and continue independent authorized work. Disclose a reversible implementation choice only when its alternative has a material consequence the caller may want to change; name the choice, alternative and reason in the handoff, without a fixed worksheet. Generated companions already included as scope require no new approval; a change to accepted direction, behavior or acceptance always needs caller authority. ## Diagnosis, scaffolding and delegated work For an unexplained failure, follow the [diagnosis loop](references/difficult-failures.md#diagnosis-loop) before repairing: confirm the failing run executes the code you think, ground the leading cause in an observation, name its strongest rival and test one prediction the two disagree on. The same file holds the experiments for races, leaked state, hangs, regressions and failures that cross components. When scaffolding is the requested change, start from the repository's existing layout (or the ecosystem's standard one for a new project) and one working vertical slice; avoid placeholder success paths and a new framework for a one-off operation. For installers, agent-facing tool servers or a Rust CLI with local state, see [agent-facing tool scaffolds](references/scaffold/agent-facing-tool-scaffolds.md). Prefer current-session execution. If delegation is authorized and useful, keep concurrent writers disjoint and isolated as [Agent Native](../agent-native/SKILL.md) describes; shared generators and integration serialize. Supply each lane its intent, acceptance, scope and review owner, then integrate its exact content and check facts. A selected wave ends with the caller-requested wave result; do not invent another wave. One fresh review of the integrated candidate can cover unjudged increments; when the integrator owns that review, workers return their handoff without commissioning another. Preserve any separately required lane judgments; a successful process exit is not semantic PASS. An explicitly requested one-shot adapter dispatches each supplied operation once, reports its output or error and stops, with no scheduler, retry controller or store; show its dispatch count and failure reporting with a dry-run or fixture. Factories require the caller's selection. ## Finish Specialists advise only; known defects stay implementation work. A genuine causal stall admits one bounded fresh helper under RPI's [stall rule](../rpi/SKILL.md#causal-stall-and-bounds); retries renew no bound. Return facts, not semantic PASS. An implement-only handoff does not authorize Git, tracker or delivery transitions; existing caller authority remains usable. A full outcome request finishes on its checks and CI; it continues to one fresh independent judgment only on [Validate's triggers](../validate/SKILL.md#when-a-fresh-judgment-is-worth-it). Success is working behavior with usable evidence, not volume of logs or process artifacts.