feat(opencode): V2 tools.post-execute alongside V1 trigger - #75
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Adds `SessionEvent.Tool.PostExecute` (live event, type `session.next.tool.post_execute`) carrying `{ tool, sessionID, callID, args, output, failed }` and fires it next to the existing V1 `plugin.trigger('tool.execute.after', ...)`.
Post-execute is observation-only — no veto, no transform (the call already happened). Plugins subscribe via `events.subscribe` or `events.subscribeAll` to attach telemetry, audit, or downstream side effects without needing a V1 plugin. The V1 hook continues to fire so existing plugins keep working.
This was referenced Aug 21, 2026
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…77) Adds `SessionEvent.Agent.PreSystem` (live waterfall event, type `session.next.agent.pre_system`) carrying `{ agent, sessionID, messageID, system }` and wires `EventV2Bridge.waterfall` into the agent generate dispatch next to the existing V1 `plugin.trigger('experimental.chat.system.transform', ...)`. The waterfall currently has a single listener that delegates to the V1 trigger so existing plugins keep working. Listeners return `{ system }` to rewrite the system prompt; throwing short-circuits the generate. Same shim pattern as #70 #72 #75 #76. `EventV2Bridge` joins the Agent layer's deps so the generate function's new service requirement propagates cleanly; `cli/cmd/agent.ts` provisions the service when running the generate effect locally.
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Adds `SessionEvent.Text.Complete` (live waterfall event, type `session.next.text.complete`) carrying `{ sessionID, messageID, partID, text }` and wires `EventV2Bridge.waterfall` into the text-complete dispatch next to the existing V1 `plugin.trigger('experimental.text.complete', ...)`.
The waterfall currently has a single listener that delegates to the V1 trigger so existing plugins keep working. Listeners return `{ text }` to transform the final text; throwing short-circuits the text part. Same shim pattern as #70 #72 #75 #76 #77 #78 #79.
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Adds
SessionEvent.Tool.PostExecute(live event, typesession.next.tool.post_execute) carrying{ tool, sessionID, callID, args, output, failed }and fires it next to the existing V1plugin.trigger('tool.execute.after', ...).Why this matters
The V1
tool.execute.afterhook is fire-and-forget — plugins can't get a return value or aggregate observations. The V2tools.post-executeevent uses the existing pub/sub machinery so plugins subscribe viaevents.subscribe/events.subscribeAllto attach telemetry, audit logs, or downstream side effects without registering a V1 plugin. The V1 hook continues to fire so existing plugins keep working.Out of scope
commands.pre-executeforcommand.execute.before(veto/transform)agent.pre-systemforexperimental.chat.system.transformpermission.requestforpermission.askEach is a focused V1→V2 shim using the same waterfall/parallel pattern from #70 #72 #73 #74.
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