Hjarni describes itself as a hosted Markdown knowledge base that ChatGPT and Claude can read and write over MCP. Its current site also lists Cursor, Claude Code, Windsurf, Cline, and other compatible MCP clients. It gives connected assistants a place to retrieve and update notes beyond a single conversation.
ShardStitch is not a hosted knowledge base. It is a local recovery layer for AI coding work after the old session is already stale, dead, locked out, or moving tools.
Where each one fits.
You want shared AI memory.
Hjarni is strong when notes, decisions, docs, and team knowledge should be queryable by AI tools over MCP.
You forgot to write the note.
ShardStitch rebuilds the current working state from the project folder, even when no memory note or wrap-up was created beforehand.
Capability comparison.
| Capability | Hjarni | ShardStitch |
|---|---|---|
| Primary job | Hosted Markdown memory for AI tools | Local after-death AI coding recovery and handoff |
| Best source of truth | User/AI-maintained notes | Disk truth: git diff, changed files, commits, notes, dependency risk |
| Requires proactive memory | Yes, notes must exist or be written by the AI | No, can recover from project state after the fact |
| Hosted vs local | Hosted service; notes live on Hjarni servers; export to Markdown available | Local recovery; no telemetry; code stays on machine during normal recovery |
| Works after session death | Only if the useful note/memory was already written | Yes, designed for stale/dead/locked/deleted sessions |
| Cross-tool memory | Yes, via MCP and supported clients | Yes, via 31 AI handoff targets across native integrations and web-chat handoff |
| Team knowledge | Strong team/shared-folder story | Focused on developer recovery and project handoff |
What a deleted session leaves behind.
Evidence-based distinction: a memory system can retrieve information that was saved. A deleted conversation may also leave project evidence such as changed files, a Git diff, commits, test output, or local notes. Those artifacts can show what changed; they cannot prove reasoning that was never saved.
This is a general limitation of the available evidence, not a claim about a statement by Hjarni's founder. Hjarni describes itself as a hosted Markdown knowledge base that ChatGPT and Claude can read and write over MCP; its site also lists Cursor, Claude Code, Windsurf, Cline, and other MCP clients. ShardStitch focuses on reconstructing current coding state from the local project when the session is gone.
Failure verdict.
Choose Hjarni when your priority is shared Markdown knowledge that AI tools can retrieve. Choose ShardStitch when a coding task needs a disk-grounded continuation packet after the conversation is stale, inaccessible, or deleted. The workflows can complement each other; neither can recover reasoning that exists only in an unavailable chat.
Bottom line: use the other tool when you want its live workflow. Use ShardStitch when the old AI session is stale, dead, locked out, deleted, or moving to another tool and you need disk-truth recovery.
Get ShardStitch ->Sources checked September 23, 2026: Hjarni product homepage and its public compatibility listings. The unsupported Reddit quote has been removed. Trademarks belong to their respective owners.