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fix: disable pruning of write/edit tools by default #219

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Merged
Tarquinen merged 1 commit into from
Jan 5, 2026
Merged

fix: disable pruning of write/edit tools by default #219

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4 changes: 2 additions & 2 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -106,7 +106,7 @@ DCP uses its own config file:
},
// Prune write tool inputs when the file has been subsequently read
"supersedeWrites": {
"enabled": true,
"enabled": false,
},
// Prune tool inputs for errored tools after X turns
"purgeErrors": {
Expand All @@ -129,7 +129,7 @@ When enabled, turn protection prevents tool outputs from being pruned for a conf
### Protected Tools

By default, these tools are always protected from pruning across all strategies:
`task`, `todowrite`, `todoread`, `discard`, `extract`, `batch`
`task`, `todowrite`, `todoread`, `discard`, `extract`, `batch`, `write`, `edit`

The `protectedTools` arrays in each section add to this default list.

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15 changes: 12 additions & 3 deletions lib/config.ts
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Expand Up @@ -58,7 +58,16 @@ export interface PluginConfig {
}
}

const DEFAULT_PROTECTED_TOOLS = ["task", "todowrite", "todoread", "discard", "extract", "batch"]
const DEFAULT_PROTECTED_TOOLS = [
"task",
"todowrite",
"todoread",
"discard",
"extract",
"batch",
"write",
"edit",
]

// Valid config keys for validation against user config
export const VALID_CONFIG_KEYS = new Set([
Expand Down Expand Up @@ -382,7 +391,7 @@ const defaultConfig: PluginConfig = {
protectedTools: [...DEFAULT_PROTECTED_TOOLS],
},
supersedeWrites: {
enabled: true,
enabled: false,
},
purgeErrors: {
enabled: true,
Expand Down Expand Up @@ -502,7 +511,7 @@ function createDefaultConfig(): void {
},
// Prune write tool inputs when the file has been subsequently read
"supersedeWrites": {
"enabled": true
"enabled": false
},
// Prune tool inputs for errored tools after X turns
"purgeErrors": {
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4 changes: 4 additions & 0 deletions lib/messages/prune.ts
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Expand Up @@ -43,6 +43,10 @@ const pruneToolOutputs = (state: SessionState, logger: Logger, messages: WithPar
}
}

// NOTE: This function is currently unused because "write" and "edit" are protected by default.
// Some models incorrectly use PRUNED_TOOL_INPUT_REPLACEMENT in their output when they see it in context.
// See: https://github.com/Opencode-DCP/opencode-dynamic-context-pruning/issues/215
// Keeping this function in case the bug is resolved in the future.
const pruneToolInputs = (state: SessionState, logger: Logger, messages: WithParts[]): void => {
for (const msg of messages) {
if (isMessageCompacted(state, msg)) {
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