chore: add migration/ bundle for cross-machine setup

Bundles state that lives OUTSIDE the xenia-rs repo so a fresh clone on
another machine can be brought up to identical configuration via
migration/setup.sh:

  - claude-memory/             ~/.claude/projects/-home-fabi-RE-Project-Sylpheed/memory/
                               (103 files, 1.1 MB - MEMORY.md + every
                                project_xenia_rs_*.md from audits
                                addis_signext through audit-058)
  - project-root/dot-claude/   <project-root>/.claude/settings.json
                               (Stop hook + permissions)
  - project-root/ppc-manual/   <project-root>/ppc-manual/
                               (PowerPC reference docs, 397 files, 3.7 MB)
  - project-root/run-canary.sh <project-root>/run-canary.sh
  - README.md                  Human-readable setup checklist
  - setup.sh                   Idempotent installer (also reclones
                               xenia-canary at pinned HEAD 6de80dffe)
  - MANIFEST.md                Per-file mapping + per-file-not-bundled
                               restoration recipe

Excluded from bundle (not shippable via git):
  - Sylpheed ISO (7.8 GB; copyright; manual copy required)
  - sylpheed.db (395 MB; regenerable from XEX via analysis tooling)
  - target/ build artifacts (rebuild on target)
  - audit-runs probe firehoses (.log/.stdout/.stderr ~11 GB; rerun if needed)
  - audit-runs memory dumps (.bin ~4.5 GB; rerun audit-026/027/029 if needed)
  - xenia-canary checkout (setup.sh reclones from
    git.mc02.dev/fabi/Xenia-Canary.git at HEAD 6de80dffe)

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

migration/project-root/ppc-manual/alu/xori.md

@@ -0,0 +1,115 @@
+# `xori` — XOR Immediate
+
+> **Category:** [Integer ALU](../categories/alu.md) · **Form:** [D](../forms/D.md) · **Opcode:** `0x68000000`
+
+<!-- GENERATED: BEGIN -->
+
+## Assembler Mnemonics
+
+| Mnemonic | XML entry | Flags | Description |
+| --- | --- | --- | --- |
+| `xori` | `xori` | — | XOR Immediate |
+
+## Syntax
+
+```asm
+xori [RA], [RS], [UIMM]
+```
+
+## Encoding
+
+### `xori` — form `D`
+
+- **Opcode word:** `0x68000000`
+- **Primary opcode (bits 0–5):** `26`
+- **Extended opcode:** —
+- **Synchronising:** no
+
+| Bits | Field | Meaning |
+| --- | --- | --- |
+| 0–5 | `OPCD` | primary opcode |
+| 6–10 | `RT` | destination GPR (or RS when storing) |
+| 11–15 | `RA` | source GPR (0 ⇒ literal 0 for RA0 forms) |
+| 16–31 | `D/SI/UI` | 16-bit signed or unsigned immediate |
+
+## Operands
+
+| Field | Role | Description |
+| --- | --- | --- |
+| `RS` | xori: read | Source GPR (alias for RD in some stores). |
+| `UIMM` | xori: read | 16-bit unsigned immediate. Zero-extended. |
+| `RA` | xori: write | Source GPR (`r0`–`r31`). |
+
+## Register Effects
+
+### `xori`
+
+- **Reads (always):** `RS`, `UIMM`
+- **Reads (conditional):** _none_
+- **Writes (always):** `RA`
+- **Writes (conditional):** _none_
+
+## Status-Register Effects
+
+_No condition-register or status-register effects._
+
+## Operation (pseudocode)
+
+```
+RA <- (RS) ^ (0x0000 || UIMM)
+```
+
+## C Translation Example
+
+```c
+/* C translation: the xenia-rs interpreter arm below in           */
+/* Implementation References is the authoritative semantic        */
+/* snapshot. Translate it line-by-line:                            */
+/*   - ctx.gpr[N]  -> r[N]       (or f[]/v[] for FPRs/VRs)        */
+/*   - mem.read_u*/write_u* -> mem_read_u*_be / mem_write_u*_be   */
+/*   - ctx.update_cr_signed(fld, v) -> update_cr_signed(fld, v)   */
+/*   - ctx.xer_ca / xer_ov / xer_so -> xer.CA / xer.OV / xer.SO   */
+/* The Register Effects and Status-Register Effects tables above  */
+/* enumerate every side effect a faithful translation must emit.  */
+```
+
+## Implementation References
+
+**`xori`**
+- xenia-canary XML: [`tools/ppc-instructions.xml` — search for `mnem="xori"`](../../xenia-canary/tools/ppc-instructions.xml)
+- xenia-canary emit: [`src/xenia/cpu/ppc/ppc_emit_alu.cc:839`](../../xenia-canary/src/xenia/cpu/ppc/ppc_emit_alu.cc#L839)
+- xenia-rs opcode: [`crates/xenia-cpu/src/opcode.rs:132`](../../xenia-rs/crates/xenia-cpu/src/opcode.rs#L132)
+- xenia-rs decoder: [`crates/xenia-cpu/src/decoder.rs:349`](../../xenia-rs/crates/xenia-cpu/src/decoder.rs#L349)
+- xenia-rs interpreter: [`crates/xenia-cpu/src/interpreter.rs:520-523`](../../xenia-rs/crates/xenia-cpu/src/interpreter.rs#L520-L523)
+<details><summary>xenia-rs interpreter body (frozen snapshot)</summary>
+
+```rust
+        PpcOpcode::xori => {
+            ctx.gpr[instr.ra()] = ctx.gpr[instr.rs()] ^ (instr.uimm16() as u64);
+            ctx.pc += 4;
+        }
+```
+</details>
+
+<!-- GENERATED: END -->
+
+## Special Cases & Edge Conditions
+
+- **No record form.** Like [`ori`](ori.md), there is no `xori.`. To get a CR0 update follow with `cmpwi` or use [`xorx`](xorx.md) with `Rc=1`.
+- **Immediate is zero-extended** to 64 bits. Only the low 16 bits of `RA` can be flipped; the high 48 bits are passed through from `RS` unchanged.
+- **`xori 0, 0, 0` is a valid NOP encoding** but the canonical NOP is `ori 0, 0, 0`. Disassemblers should still display this as `xori r0, r0, 0` or recognise it as a no-op.
+- **64-bit operation in xenia-rs.** [`interpreter.rs:338`](../../xenia-rs/crates/xenia-cpu/src/interpreter.rs#L338) — full `u64` XOR with the immediate.
+- **No `XER`, no `CR`** side effects.
+- **`RA = 0` reads `r0`** (not literal zero); see [`ori`](ori.md).
+- **Useful for masked toggle.** `xori rA, rS, mask` flips the bits of `rS` indicated by `mask` (low 16 bits only).
+
+## Related Instructions
+
+- [`xoris`](xoris.md) — companion (immediate shifted left 16).
+- [`xorx`](xorx.md) — register-register XOR.
+- [`eqvx`](eqvx.md) — `~(RS ^ RB)`.
+- [`ori`](ori.md), [`andix`](andix.md) — sister immediate logicals.
+
+## IBM Reference
+
+- [AIX 7.3 — `xori` (XOR Immediate)](https://www.ibm.com/docs/en/aix/7.3.0?topic=set-xori-immediate-instruction)