engram
one Go binary with SQLite full-text search, memory for coding agents over MCP. https://github.com/Gentleman-Programming/engram
- Core
- 64% · 35.2 / 55 (mean)
- Core (public2)
- 44% · 24.4 / 55 (mean)
- Private set
- no drop detected (±5.7) · δ 3 · shift −2.8 from 5 other memories · public2 3 builds, private 1 · holdout-v1 3cd42b9f
- Full
- 70% · 45.2 / 65 · 65 of 100 measured
- Runs
- 3 · core 35.2–35.2 · the details below are the median run
- Common with gbrain
- 45.2 vs 50.4 on 65
- Chars per answer
- 4,314 · answer after 978
- Write → visible
- 34 ms · p95 35 ms
- Write-back
- 2 of 2 degraded answers came back
- Reached through
- MCP / CLI
- Model on write
- no
- Key needed
- none
- Where it runs
- local
- License
- MIT
- Deterministic
- yes
Configuration
| Version | engram 2.2.1 (Windows release binary) |
| Mode | local binary, MCP stdio with the agent tool profile (engram mcp --tools=agent, 19 tools), fresh store |
| Door | mem_search(query, match_mode="any", limit=10) over MCP stdio; the door is the tool's whole JSON text |
| Results | limit 10 (Engram's default), no cut |
| Model inside | none |
| Embeddings | none (SQLite FTS5 full-text search) |
| Storage | SQLite with FTS5 |
| Not default | match_mode "any" instead of the tool's default "all" (with "all" a question asked as it is finds nothing); a fresh scratch data directory instead of the default one in the user's home (deletes are soft and the probes' conflict relations stay behind) |
Notes: 2.2.1 Windows release, MCP stdio with the agent tool profile (19 tools), door mem_search in 'any' mode (the default 'all' finds nothing for a verbatim question), fresh store. Run 2026-09-30, door search,
fingerprint d3dc508ab2. Report:
examples/engram_report/reference.md · All runs: examples/engram_report/repeats.json · public2: examples/engram_report/reference_public2.md
Sections
door | 21.9 of 25 · 7 pass · 1 fail | FAIL What is the owner's phone number? — missing +39 |
cards | not measured | section not measured: no entity cards in this memory |
updates | 3.3 of 10 · 1 pass · 2 fail | FAIL a new write with a changed value replaces the old one at the door (no id given) — new value served in 40 ms; STALE: the old value is still delivered (31 reads with both) FAIL restating the current value does not pile up a second copy — 3 copies delivered |
time | 6.7 of 10 · 4 pass · 2 fail | FAIL semantic memories carry their age (37/72) — 51% FAIL an imported memory reaches the door with its original date — served with no date |
live state | 10.0 of 10 · 7 pass · 0 fail | |
abstention | 3.3 of 10 · 0 pass · 4 fail | FAIL What is the Zarpetta module? — episodes presented as direct matches; 10 keyword facts for something that does not exist FAIL Who is Ottavio Brambillesco? — episodes presented as direct matches; 10 keyword facts for something that does not exist FAIL Which port does the Fulmicotone service use? — episodes presented as direct matches; 10 keyword facts for something that does not exist FAIL What does the calendar plugin Girandola do? — episodes presented as direct matches; 10 keyword facts for something that does not exist |
file search | not measured | section not measured: no repo configured (--repo) |
graph | not measured | section not measured: no case with evidence (all SKIP or no cases) |