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Universal AI Development Platform with working MCP integration, multi-provider support, voice (TTS/STT/realtime), and professional CLI. 58+ external MCP servers discoverable, multimodal file processing, RAG pipelines. Build, test, and deploy AI applicatio
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JavaScript
/**
* Effective History Filter
*
* Filters message arrays to return only "visible" messages,
* excluding those tagged by condensation or truncation.
* Supports non-destructive context management where messages
* are tagged instead of deleted.
*/
/**
* Get the effective (visible) history from a message array.
*
* Filters out:
* - Messages with a condenseParent (replaced by a summary)
* - Messages with a truncationParent (hidden by truncation)
*
* Keeps:
* - Summary messages (isSummary = true)
* - Truncation markers (isTruncationMarker = true)
* - All other untagged messages
*/
export function getEffectiveHistory(messages) {
return messages.filter((msg) => {
// Exclude messages that have been condensed (replaced by summary)
if (msg.condenseParent) {
return false;
}
// Exclude messages that have been truncated (hidden by marker)
if (msg.truncationParent) {
return false;
}
return true;
});
}
/**
* Tag messages for condensation (non-destructive summary).
*
* @param messages - Full message array
* @param fromIndex - Start index of messages to condense
* @param toIndex - End index (exclusive) of messages to condense
* @param condenseId - UUID for this condensation group
* @returns Updated message array with tags applied
*/
export function tagForCondensation(messages, fromIndex, toIndex, condenseId) {
return messages.map((msg, i) => {
if (i >= fromIndex && i < toIndex) {
return { ...msg, condenseParent: condenseId };
}
return msg;
});
}
/**
* Tag messages for truncation (non-destructive hiding).
*
* @param messages - Full message array
* @param fromIndex - Start index of messages to truncate
* @param toIndex - End index (exclusive) of messages to truncate
* @param truncationId - UUID for this truncation group
* @returns Updated message array with tags applied
*/
export function tagForTruncation(messages, fromIndex, toIndex, truncationId) {
return messages.map((msg, i) => {
if (i >= fromIndex && i < toIndex) {
return { ...msg, truncationParent: truncationId };
}
return msg;
});
}
/**
* Remove condensation tags (rewind).
* Makes previously condensed messages visible again.
*/
export function removeCondensationTags(messages, condenseId) {
return messages
.map((msg) => {
if (msg.condenseParent === condenseId) {
const { condenseParent, ...rest } = msg;
return rest;
}
// Also remove the summary message itself
if (msg.condenseId === condenseId && msg.metadata?.isSummary) {
return null;
}
return msg;
})
.filter((msg) => msg !== null);
}
/**
* Remove truncation tags (rewind).
* Makes previously truncated messages visible again.
*/
export function removeTruncationTags(messages, truncationId) {
return messages
.map((msg) => {
if (msg.truncationParent === truncationId) {
const { truncationParent, ...rest } = msg;
return rest;
}
// Also remove the truncation marker itself
if (msg.truncationId === truncationId && msg.isTruncationMarker) {
return null;
}
return msg;
})
.filter((msg) => msg !== null);
}
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