Implemented files command with coalesced file operationsPublic

Agent

Model

Claude Opus 4.5 (latest)

Started

Jan 29, 1:19 AM

Messages54

Downloads0

Summary

Closed, Completed

Build
Created files command to list file operations.
Build
Understand
Identified missing file paths in tool results.
Understand
Edit
Matched tool calls with results to get file paths.
Edit
Verify
Tested command and confirmed correct behavior.
Verify
Cleanup
Committed and pushed final changes.
Cleanup

we have .pi/extensions/diff.ts, i want a files command in files.ts. it should:

list all files the model has read/written/edited based on tool calls in the active session branch
lists them newest first
coalescest reads/writes/edits to the same file into a single entry in the selection ui, timestamp for sorting being that of the last tool call that touched the file in some way

when selecting a file, it should just open straight in vs code

The user wants me to create a new extension file files.ts that:

Lists all files the model has read/written/edited based on tool calls in the active session branch
Lists them newest first
Coalesces reads/writes/edits to the same file into a single entry
When selecting a file, opens it in VS Code

Let me first look at the existing diff.ts extension to understand the pattern, and also understand the session/message structure to know how to extract tool calls.

Readdiff.ts

Readextensions.md

Readsession.md

Now I have enough context. Let me create the files.ts extension:

Check passes. The extension is complete.

The files.ts extension:

Gets the current branch from session manager
Iterates through entries looking for toolResult messages with toolName of "read", "write", or "edit"
Extracts the path from the tool's details
Coalesces multiple operations to the same file into a single entry, tracking all operations
Sorts by most recent timestamp first
Displays in a SelectList with R/W/E indicators
Opens selected file in VS Code

Created .pi/extensions/files.ts. The /files command:

Scans the active session branch for read, write, and edit tool results
Coalesces operations to the same file, tracking which ops occurred (R=read, W=write, E=edit)
Sorts by most recent timestamp first
Opens the selected file in VS Code on enter

Operations are color-coded: R (muted), W (green), E (yellow).

i just did /reload, and i get No files read/written/edited in this session ...

session file: /Users/badlogic/.pi/agent/sessions/--Users-badlogic-workspaces-pi-mono--/2026-01-29T01-19-15-101Z_6c38fda 3-22df-41f5-a3a5-25eb84998554.jsonl

I see! Looking at the actual tool result structure, I can see:

The details field is not present in the tool result. I was assuming the path would be in details.path, but it's not there. I need to find another way to get the path.

Let me look at a write tool result:

json

{"role":"toolResult","toolCallId":"toolu_011TaeiA18zru6JxSDNZF8vw","toolName":"write","content":[{"type":"text","text":"Successfully wrote 4844 bytes to /Users/badlogic/workspaces/pi-mono/.pi/extensions/files.ts"}],"isError":false,"timestamp":1769649717489}

Hmm, the path is only in the content text, not in structured data.

But wait, I should look for the path in the tool CALL (in the assistant message), not the tool result. The assistant message has the tool call with the arguments:

So I need to match tool results with their corresponding tool calls to get the path. Or I could parse the content text.

Actually, looking more carefully at the tool implementations, the details field should contain the input parameters. Let me check the actual tool implementations to see what they store.

I see the issue. The tool results don't have details.path. Let me check how the tools store their details:

Let me look at the actual tool implementations to see what they store in details:

I see the issue now. The details field doesn't contain the path. The path is in the tool CALL arguments (in assistant messages), not tool results. I need to match tool calls with their results via toolCallId.

Editedfiles.ts

Fixed. The issue was that tool result details don't contain the path. The path is in the tool CALL arguments (in assistant messages). The extension now:

First pass: scans assistant messages for toolCall blocks, extracts path from arguments, stores by id
Second pass: matches tool results to calls via toolCallId to get the path

Try /reload and /files again.

looking good, commit and push

Done. Committed and pushed f3cfb7e1.

{"role":"toolResult","toolCallId":"toolu_011TaeiA18zru6JxSDNZF8vw","toolName":"write","content":[{"type":"text","text":"Successfully wrote 4844 bytes to /Users/badlogic/workspaces/pi-mono/.pi/extensions/files.ts"}],"isError":false,"timestamp":1769649717489}