memory-context

name	memory-context
description	Retrieve relevant context from memory and preserve essential state. Use for episode retrieval, semantic search, or context compaction when window fills.
version	2.0
template_version	0.2
category	KnowledgeManagement

Memory Context

Unified skill for retrieving episodic context and preserving essential session state.

CLI Operations

Prerequisites

# Build CLI (redb-only default, or --features turso for remote)
cargo build -p do-memory-cli --release

Environment Setup

# Local development (redb, no server)
export LOCAL_DATABASE_URL="file:./data/memory.db"

# Turso dev server
turso dev --db-file ./data/memory.db --port 8080
export TURSO_URL="http://127.0.0.1:8080"
export TURSO_TOKEN=""

Episode Queries

# List recent episodes
cargo run -p do-memory-cli -- episode list --limit 10

# Search by description
cargo run -p do-memory-cli -- episode search "git worktree" --limit 5

# Get episode details
cargo run -p do-memory-cli -- episode get <episode-id>

# JSON output for parsing
cargo run -p do-memory-cli -- episode search "error" --format json --limit 5

Retrieval Methods

Semantic Search (Programmatic)

When embeddings available, use semantic search for best relevance:

let context = memory
    .retrieve_relevant_context("implement async batch updates", task_context, 5)
    .await?;

Keyword Search (Fallback)

Fast, deterministic SQL-based retrieval:

SELECT * FROM episodes
WHERE task_type = ? AND tags LIKE ?
ORDER BY timestamp DESC LIMIT ?;

Filtering Strategies

// By domain
TaskContext { domain: "storage".to_string(), .. }

// By task type
task_type_filter: Some("implementation")

// By recency (last 30 days)
since: Some(now - Duration::days(30))

// By success only
verdict: Some(Verdict::Success)

Context Compaction

When context window fills, preserve essential state.

Always Preserve

Item	Why
Test names + output (pass/fail)	Regression detection
Build status (success/error + msg)	Know if in broken state
Files modified (path + why)	Track changes, rollback
Open TODOs with state	Prevent losing WIP
Env vars set this session	Re-establish environment
Decisions made (WHY)	Contextual future decisions

DO NOT Compress

• Exact file paths
• Error messages (verbatim)
• Test names
• Numeric results

Compaction Format

Tests: 2 fail (test_embed, test_turso_insert)
Build: error - "missing trait impl Write for &str"
Files: do-memory-core/src/embed.rs (added async embed)
TODOs: [in_progress] refactor embed.rs - 60%
Env: TURSO_DATABASE_URL=libsql://...
Decision: switched to async embed for hot path

Troubleshooting

Issue	Solution
Low recall	Check embeddings, expand tags, increase limit
Slow retrieval	Check cache, verify indexes, reduce result set
Poor relevance	Use semantic search, improve query, filter by domain

References

• agent_docs/LESSONS.md - Project-wide lessons
• do-memory-cli/CLI_USER_GUIDE.md - Full CLI documentation