# Source Discovery Ledger

Date: 2026-07-09
Current loop: Stage C / Loop C1 - log decryptor and PacketReader parser

## Objective

Build the first business read capability path for `isphere_receive_messages` from decrypted `PacketReader.ProcessPacket` XMPP message logs.

## Inputs

- `docs/source-discovery/2026-07-09-n12-pre-zyl-index.md`
- `docs/source-discovery/2026-07-09-n12-pre-zyl-schema-notes.md`
- `docs/source-discovery/capability-source-matrix.md`
- `docs/mcp-core-tools-contract.md`
- `docs/mcp-core-business-plan.md`

## Loop protocol

1. Write or update the plan before coding.
2. Implement one loop only.
3. Run loop-specific tests.
4. Run full verification with `go test ./...` and `go build ./cmd/isphere-mcp`.
5. Commit exact paths.
6. Update the next loop based on actual results.
7. Continue automatically while the next step is clear; ask the user only when blocked or when the business direction changes.

## Current loop output

Loop C1 must produce:

1. `internal/isphere/logcodec.DecryptLine` for DES/CBC/PKCS7 Base64 log lines.
2. `internal/isphere/packetlog.ParseMessageLog` for redacted `PacketReader.ProcessPacket` XMPP `<message>` stanzas.
3. Passing unit tests with synthetic/redacted fixtures only.
4. A plan update for Loop C2 before any source abstraction code starts.

## Current plan

See `docs/superpowers/plans/2026-07-09-stage-c-log-backed-receive-messages-loop.md`.

## Last completed discovery result

Stage B2 showed that selected `MsgLib.db` files are not direct SQLite. Decrypted `PacketReader.ProcessPacket` XML is now the first implementable source for `isphere_receive_messages`.