Aider
Appends conversation turns to .aider.chat.history.md in project root. restore_chat_history defaults to false — no automatic replay into new sessions. Community /session save command for JSON state snapshots. .aider.conf.yml carries static preferences.
Active · Verified 2026-10-22 · fresh as of 2026-10-22 · 51 cited facts, 2 with a third-party source · 1 recorded change · Suggest a correction
At a glance
- Type
- Per-repo chat history file + YAML config vendor fix
- Tier
- T2
- Section
- Coding-agent memory
- Latest release
- v0.86.2 (2026-02-12) registry fix
- License
- Apache-2.0 repo fix
- GitHub
- Aider-AI/aider — ~41k stars (ecosyste.ms) to ~49.7k (releasealert.dev), last commit 2026-02 third-party fix
- Funding
- no public funding fix
- Freshness
- 2026-10-22 fix
- Layer
- agent-infra repo fix
- Licensing
- open-source repo fix
Memory taxonomy
- storage
- file
- retrieval
- injection
- persistence
- cross-session
- update
- append-only
- unit
- episode
- governance
- user-controllable
- conflict
- none
When to use
Optimised for: simplicity / minimal config / per-repo chat history
Anti-fit: not for non-coding tasks; not for shared/team memory
Pros & cons
Pros
Most established CLI coding agent; explicit project-level conventions file + repo map keeps memory inspectable.
Cons
CLI-only — no IDE integration; memory is inspectable but not auto-learned.
Claims & capabilities
No vector store, no server-side persistence — file-only.
Technical surface
- API surface
- CLI (interactive REPL + /commands); no public REST/SDK
- Backend storage
- file (.aider.chat.history.md)
- Deployment
- Self-hostable
- Embedding model
- not applicable — uses LLMs not embeddings
- Multi-tenancy
- not applicable — CLI
- MCP
- no — uses CONVENTIONS.md instead
- A2A
- not supported
- OpenTelemetry
- no
Alternatives to Aider → live options ranked by shared design, licence, hosting and MCP support
Similar systems
Other coding-agent memory in the catalog, ranked by inbound references.
- Devin (Cognition) T1
Structured Knowledge items stored server-side. Three-tier scope: repo-pinned (always injected), global (recall by relevance), org/enterprise (visible to org members). Auto-generates Repo Knowledge from repo structure each session; reads past session trajectories for self-improvement; writes notes for recurring scheduled tasks.
- Augment Code T1
Real-time knowledge graph indexed from connected repos + commit history + CI/CD + tickets + docs. Separate Agent Memory layer (Sept 2025) captures session decisions/corrections/goals as discrete items with developer review/approval UI. MCP endpoint exposes the graph. Acquired by Harness (2026-10-08): Harness bought select Augment Code assets, including Cosmos, the Auggie CLI and the Context Engine, and the team joined Harness. augmentcode.com now leads with Cosmos, a software-factory agent platform.
- Letta Code T3
Letta's stateful coding-agent harness: agents rewrite their own memory blocks and skills, version context in git via MemFS (syncable to GitHub) and reflect via a periodic /sleeptime 'dreaming' process. from Letta (MemGPT) team. letta-ai/letta-code is now the main Letta source (harness, terminal UI, App Server, channels); the Letta V1 API server was retired to the archive branch of letta-ai/letta.
- Replit Agent T1
No documented built-in persistent semantic memory store. Session duration expanded to 200 min (Agent 3); Agent 4 shifts toward persistent runtimes. Temporal used for orchestration durability, not semantic memory. Cross-session memory relies on filesystem + agent-written notes.
- agentmemory (rohitg00) T3
Self-hosted persistent memory layer that captures coding-agent activity and recalls it in later sessions, positioned on public benchmark results. #7 in TeleAI Awesome-Agent-Memory
- Beads (Steve Yegge) T3
Dolt-backed, dependency-aware graph issue tracker that acts as persistent structured memory for coding agents, replacing markdown plans; `bd remember` stores durable facts and `bd prime` re-injects them.
Sources (50 cited facts, 2 third-party)
Each fact links to the page it came from; the badge says who published it (how to read sources).
- What it is Per-repo chat history file + YAML config vendor
- What it does & what's distinct Appends conversation turns to .aider.chat.history.md in project root. restore_chat_histo… vendor
- Claims / benefits No vector store, no server-side persistence — file-only. vendor
- Modalities text vendor
- Created 2023-05 vendor
- Latest release v0.86.2 (2026-02-12) registry
- License Apache-2.0 repo
- GitHub Aider-AI/aider — ~41k stars (ecosyste.ms) to ~49.7k (releasealert.dev), last commit 2026… third-party
- Customers / scale 1-10 ppl No named enterprise customers, OSS CLI tool vendor
- Pricing OSS vendor
- Data handling Local-only; no server-side data retention; opt-in anonymous analytics with no personal i… vendor
- Deployment Self-hostable vendor
- HQ US repo
- Founders / pedigree Paul Gauthier (solo founder; ex-founding CTO Inktomi 1996-2000; ex-Google) third-party
- Memory volume / scale no scale claim vendor
- API surface CLI (interactive REPL + /commands); no public REST/SDK vendor
- Backend storage file (.aider.chat.history.md) vendor
- Consistency strong vendor
- Versioning immutable append-log vendor
- Tombstoning append-only no delete vendor
- Schema evolution free-form / no schema vendor
- Namespace primitives hierarchical vendor
- Contradiction handling always append (no resolution) vendor
- Forgetting policy user-controlled forget vendor
- MCP support no — uses CONVENTIONS.md instead vendor
- A2A support not supported vendor
- OTel no vendor
- Webhooks / events no vendor
- Import / export Markdown CONVENTIONS.md / chat history files vendor
- Validated verticals coding agents only - solo developers, OSS users vendor
- Time to running <10min (pip install aider-chat) vendor
- Anti-fit not for non-coding tasks; not for shared/team memory vendor
- Optimised for simplicity / minimal config / per-repo chat history vendor
- Adjacent infrastructure BYO LLM provider; OSS + local vendor
- Pros Most established CLI coding agent; explicit project-level conventions file + repo map ke… vendor
- Cons CLI-only — no IDE integration; memory is inspectable but not auto-learned. vendor
- Project & sources aider.chat FAQ vendor
- commit-trajectory [{"ym":"2025-04","cum":12432},{"ym":"2025-05","cum":12802},{"ym":"2025-06","cum":12929},… repo
- download-trajectory [{"ym":"2025-11","monthly":141220,"cum":141220},{"ym":"2025-12","monthly":221453,"cum":3… registry
- cost-input-usd-per-mtok 0 vendor
- cost-output-usd-per-mtok 0 vendor
- cost-tier free vendor
- cost-pricing-model free-tier vendor
- cost-last-verified 2026-06-29 vendor
- architecture-deployment-locus local vendor
- licensing-bucket open-source repo
- positioning-platform-vs-product product vendor
- taxonomy-three-layer-rollup agent-infra repo
- sdk-languages python repo
- maturity beta registry
What changed
Changes to this record's lifecycle, licence, release, pricing and hosting facts, from the catalog's git history. Subscribe (Atom)
Related systems
Referenced by (1)
- Vercel AI Gateway integrates with — Vercel AI Gateway docs have a Aider coding-agent page. (verified 2026-10-29)