memory-jq

name	memory-jq
description	Efficiently update JSON memory fields using jq patterns
user-invocable	true
argument-hint	<operation> <path> <value>
allowed-tools	Read, Bash

Memory JQ

Efficiently update JSON memory fields without loading the entire file.

Arguments

$ARGUMENTS - Operation in format: <operation> <json-path> [value]

Operations:

• set - Set a field value
• append - Add to an array
• increment - Increment a number
• get - Read a field value

Common Patterns

Set a simple field

jq '.profile.name = "Value"' memory/memory_index.json > tmp.json && mv tmp.json memory/memory_index.json

Set with variable (use --arg)

jq --arg val "New Value" '.profile.name = $val' memory/memory_index.json > tmp.json && mv tmp.json memory/memory_index.json

Append to array

jq '.memory.key_facts += ["New fact to remember"]' memory/memory_index.json > tmp.json && mv tmp.json memory/memory_index.json

Update timestamp

jq '.metadata.last_updated = now | todate' memory/memory_index.json > tmp.json && mv tmp.json memory/memory_index.json

Increment counter

jq '.metadata.total_interactions += 1' memory/memory_index.json > tmp.json && mv tmp.json memory/memory_index.json

Add entity

jq '.entities += [{"type": "person", "name": "John", "relationship": "client"}]' memory/memory_index.json > tmp.json && mv tmp.json memory/memory_index.json

Update nested field

jq '.context.active_topics = ["topic1", "topic2"]' memory/memory_index.json > tmp.json && mv tmp.json memory/memory_index.json

Read a field (get operation)

jq '.profile.name' memory/memory_index.json

Read array length

jq '.memory.key_facts | length' memory/memory_index.json

Execution

1. Parse the user's $ARGUMENTS to determine operation
2. Construct the appropriate jq command
3. Execute with atomic write (tmp file + mv)
4. Report the change made

Safety

• Always use tmp file pattern to avoid corruption
• Validate JSON after write with jq '.' memory/memory_index.json
• Report errors if jq fails