Minga.Buffer.EditSource (Minga v0.1.0)

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Identifies who made an edit to a buffer.

The rich source type flows through events, ghost cursors, and the edit timeline. The undo history uses a simpler atom-based source; use to_undo_source/1 to bridge.

Creating sources

Always use the constructor functions instead of building raw tuples:

EditSource.user()
EditSource.agent(session_pid, tool_call_id)
EditSource.lsp(:elixir_ls)
EditSource.formatter()
EditSource.unknown()

Constructors validate arguments with guards (e.g. session_id must be a pid, server_name must be an atom). Pattern matching on the raw shapes is fine and encouraged; only construction should go through constructors.

Source variants

  • :user — interactive keystroke from the human
  • {:agent, session_id, tool_call_id} — agent tool applying an edit
  • {:lsp, server_name} — LSP-initiated edit (code action, rename)
  • :formatter — format-on-save or explicit format command
  • :unknown — source not determined (legacy code paths during migration)

Summary

Types

t()

Rich edit source for events, ghost cursors, and edit timeline.

undo_source()

Simple edit source for undo/redo attribution.

Functions

agent(session_id, tool_call_id)

Edit from an agent tool call.

formatter()

Edit from format-on-save or explicit format command.

from_undo_source(atom)

Converts a simple undo source atom to the rich event source.

lsp(server_name)

Edit from an LSP server (code action, rename, etc.).

to_undo_source(arg1)

Maps a rich edit source to the simple atom used by the undo stack.

unknown()

Source not determined (legacy code paths during migration).

user()

Interactive edit from the human user.

Types

t()

@type t() ::
  :user
  | {:agent, session_id :: pid(), tool_call_id :: String.t()}
  | {:lsp, server_name :: atom()}
  | :formatter
  | :unknown

Rich edit source for events, ghost cursors, and edit timeline.

undo_source()

@type undo_source() :: :user | :agent | :lsp | :recovery

Simple edit source for undo/redo attribution.

Functions

agent(session_id, tool_call_id)

@spec agent(pid(), String.t()) :: t()

Edit from an agent tool call.

formatter()

@spec formatter() :: t()

Edit from format-on-save or explicit format command.

from_undo_source(atom)

@spec from_undo_source(undo_source()) :: t()

Converts a simple undo source atom to the rich event source.

Used when Buffer.Process mutation functions are called without an explicit source parameter, preserving backward compatibility.

Note: for :agent, the returned session_id is the Buffer.Process's own PID, not an agent session PID. The undo stack doesn't preserve the original session reference. Treat it as a sentinel indicating "some agent edit, origin unknown."

lsp(server_name)

@spec lsp(atom()) :: t()

Edit from an LSP server (code action, rename, etc.).

to_undo_source(arg1)

@spec to_undo_source(t()) :: undo_source()

Maps a rich edit source to the simple atom used by the undo stack.

This bridge exists so the undo system can continue using atom-based guards until Provenance Undo (#1108) migrates it to the rich type.

unknown()

@spec unknown() :: t()

Source not determined (legacy code paths during migration).

user()

@spec user() :: t()

Interactive edit from the human user.