forth: parsing/dictionary '/[']/EXECUTE/LITERAL/POSTPONE/WORD/FIND/>BODY (Hayes 463/638, 72%)

plans/forth-on-sx.md

@@ -90,7 +90,7 @@ Representation:
 - [x] Mixed/double-cell math: `S>D`, `M*`, `UM*`, `UM/MOD`, `FM/MOD`, `SM/REM`, `*/`, `*/MOD`
 - [x] Double-cell ops: `D+`, `D-`, `D=`, `D<`, `D0=`, `2DUP`, `2DROP`, `2OVER`, `2SWAP` (already), plus `D>S`, `DABS`, `DNEGATE`
 - [x] Number formatting: `<#`, `#`, `#S`, `#>`, `HOLD`, `SIGN`, `.R`, `U.`, `U.R`
-- [ ] Parsing/dictionary: `WORD`, `FIND`, `EXECUTE`, `'`, `[']`, `LITERAL`, `POSTPONE`, `>BODY`, `DOES>`
+- [x] Parsing/dictionary: `WORD`, `FIND`, `EXECUTE`, `'`, `[']`, `LITERAL`, `POSTPONE`, `>BODY` (DOES> deferred — needs runtime-rebind of last CREATE)
 - [ ] Source/state: `SOURCE`, `>IN`, `EVALUATE`, `STATE`, `[`, `]`
 - [ ] Misc Core: `WITHIN`, `MAX`/`MIN` (already), `ABORT`, `ABORT"`, `EXIT`, `UNLOOP`
 - [ ] File Access word set (via SX IO)
@@ -106,6 +106,23 @@ Representation:
 
 _Newest first._
 
+- **Phase 5 — parsing/dictionary words `'`/`[']`/`EXECUTE`/`LITERAL`/
+  `POSTPONE`/`WORD`/`FIND`/`>BODY` (Hayes 448→463, 72%).** xt is
+  represented as the SX dict reference of the word record, so
+  `'`/`[']` push the looked-up record and `EXECUTE` calls
+  `forth-execute-word` on the popped value. `LITERAL` (IMMEDIATE)
+  pops a value at compile time and emits a push-op. `POSTPONE`
+  (IMMEDIATE) compiles into the *outer* def an op that, when run
+  during a *later* compile, appends a call-w op to whatever def is
+  current — the standard two-tier compile semantic. Added
+  `state.last-defined` tracked by every primitive/colon definition
+  so `IMMEDIATE` can target the most-recent word even after `;`
+  closes the def. CREATE now stashes its data-field address on the
+  word record so `>BODY` can recover it. `WORD`/`FIND` use the byte
+  memory and counted-string layout already in place.
+  `DOES>` is deferred — needs a runtime mechanism to rebind the
+  last-CREATE'd word's action.
+
 - **Phase 5 — pictured numeric output: `<#`/`#`/`#S`/`#>`/`HOLD`/`SIGN` +
   `U.`/`U.R`/`.R` (+9; Hayes 446→448, 70%).** Added a `state.hold`
   list of single-character strings — `<#` resets it, `HOLD` and