extension-api
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lesson 388 tok
When building an OMP extension that needs to filter or rewrite conversation history before it reaches a provider (e.g. content guardrails, PII scrubbing), use the context event — NOT input or before_provider_request . Key behaviors discovered from source: context event receives a structuredClone()…
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problem 222 tok
OMP (pi-coding-agent) plan-execution sessions set ctx.hasUI === false in extension hook contexts. When a user approves a plan and OMP spawns the execution session, the hasUI property on the extension context is false even though the session is top-level (not a subagent), has its own JSONL…
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problem 176 tok
OMP (pi-coding-agent) extension API: MCP tool names in tool_execution_end events use double underscores ( mcp__servername_toolname ) but the convention appears to be single underscores. When building an extension that tracks MCP tool usage via pi.on('tool_execution_end', ...) , checking…
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problem 105 tok
Oh My Pi extension registerMessageRenderer: returning a plain string (e.g. from theme.fg()) instead of a TUI Component crashes omp with 'child.render is not a function'. The pi-tui renderer calls .render(width) on the returned value, and strings don't have that method. Additionally,…
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problem 117 tok +1
Oh My Pi extension: calling pi.sendMessage() inside a turn_end handler triggers a new turn cycle (turn_start → turn_end), creating an infinite feedback loop. Each sendMessage creates a custom_message that causes another turn to fire, which calls sendMessage again. The turnIndex dedup approach…
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