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SaladDay 2589384e68 feat(core): add first-class Pi session indexing (#23 )

Pi cannot be read as another linear JSONL stream. Its history is a tree with
a durable leaf, orphan roots, branch summaries, and two compaction forms, so
the active context is something the format states rather than something line
order implies. The adapter keeps those semantics inside itself and projects
the result into the existing canonical tables.

Sessions are keyed by (normalized header cwd, header id) rather than by path,
because Pi's --session-id lookup is project-local: two projects may reuse an
id, while a move or an identical copy is still one session. Discovery covers
both layouts Pi writes and fingerprints each file by mtime, ctime, size and
inode, so a rewrite that preserves mtime is not read as unchanged.

Abandoned branches are preserved rather than dropped. Visibility becomes
three-state -- visible, inactive, hidden -- and helpers return only visible
rows until includeInactive asks for the superseded path, labeling every row
so a caller knows which it holds. Usage counts all three, because an
abandoned call still spent tokens; message_count reports only the visible
transcript.

A committed MIT-licensed oracle transcribed from Pi 0.83.0 pins the context
algorithms, and a fixed-seed differential runs 512 generated sessions against
it on every test run. Schema changes are additive.

2026-08-04 23:33:01 +08:00

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Obelisk Skill

Explicit memory infrastructure for coding agents — a queryable SQLite evidence layer over local Claude Code, Codex, Kimi Code, and Pi session history.

Install with your agent (recommended)

Paste this into a coding agent with shell access:

Install Obelisk by fetching and following this guide:
curl -fsSL https://raw.githubusercontent.com/tommy0103/obelisk/main/SKILL.md

The agent installs and verifies the CLI first, then asks whether this skill should be installed for the current project or globally.

Install manually

npm install --global @obelisk-apps/cli
obelisk install

The CLI is the executable runtime. This repository contains only the agent instructions and progressive-disclosure references.

Then in any Claude Code session:

/obelisk <your question>

Source

This repository is auto-published from the docs-only skill artifact of tommy0103/obelisk. Do not open pull requests here — contribute to the source repo instead.

License

MIT — see LICENSE in this repository. The source repository is AGPL-3.0; this skill documentation artifact is explicitly relicensed under MIT by the copyright holder.

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