engram tiered storage M3: wire store behind ENGRAM_STORE (default off) + .egm rename

Caller-side shim in el_runtime.c maps EngramNode/Edge <-> StoreNode/Edge; engine
keeps zero soul deps (libengram boundary, design §10). Flag off = today's JSON
path byte-for-byte (proven: no neuron.egm created, graph identical). Flag on =
engram_open (import snapshot.json once into neuron.egm, else WAL-replay) +
resident load; node/edge create + forget dual-write via guarded hooks. Files
renamed engram.store->neuron.egm, engram.wal->neuron.wal.

Gate: M3 parity PASS (graph on==off byte-exact modulo ordering; snapshot round-trip;
reboot-from-egm with snapshot.json deleted; activation set+sequence identical;
ASan/UBSan clean). M1 33/33 + M2 36/36 green post-rename.

Known gap (pre-flip): in-place hebb/WM/activation_count updates during activation
are not yet persisted to the store (create/connect/forget are). Must close before
live flip so learned edges survive restart.
This commit is contained in:
2026-08-11 23:21:21 -05:00
parent 8affb1d6e0
commit a72145b44e
6 changed files with 588 additions and 12 deletions
+126
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@@ -0,0 +1,126 @@
#!/usr/bin/env bash
# M3 JSON-parity gate. Pure C harness (NOT elb/elc): links the real el_runtime.c
# native engram builtins + engram_store.c and drives ENGRAM_STORE on vs off.
# Writes ONLY under a throwaway /tmp dir with a throwaway HOME + ENGRAM_DATA_DIR.
set -u
HERE="$(cd "$(dirname "$0")" && pwd)"
RT="$HERE/../../lang/runtime/el_runtime.c"
ST="$HERE/../../lang/runtime/engram_store.c"
INC="$HERE/../../lang/runtime"
WORK="$(mktemp -d /tmp/engram-m3-XXXXXX)"
DATA="$WORK/data"; mkdir -p "$DATA"
BIN="$WORK/m3"
export HOME="$WORK/home"; mkdir -p "$HOME" # never touch real ~/.neuron
export ENGRAM_DATA_DIR="$DATA"
export ENGRAM_WAL_SYNC=always
unset ENGRAM_STORE
fail=0
echo "== compiling harness (gcc: el_runtime.c + engram_store.c + test_m3_parity.c) =="
gcc -O1 -std=c11 -I "$INC" "$HERE/test_m3_parity.c" "$RT" "$ST" -lcurl -o "$BIN" 2>"$WORK/cc.log"
if [ $? -ne 0 ]; then echo "COMPILE FAILED:"; cat "$WORK/cc.log"; rm -rf "$WORK"; exit 1; fi
grep -i warning "$WORK/cc.log" | grep -iE 'engram_store|eg_store|eg_load|scan_nodes|scan_edges' && echo "(warnings in M3 code above)" || true
echo
echo "== 0) default-OFF: flag unset leaves the store untouched =="
( unset ENGRAM_STORE; "$BIN" offcheck "$DATA" )
[ $? -ne 0 ] && { echo "FAIL: offcheck"; fail=1; }
[ -e "$DATA/neuron.egm" ] && { echo "FAIL: neuron.egm created while flag OFF"; fail=1; } \
|| echo " ok: no neuron.egm created with flag OFF"
echo
echo "== 1) seed (ENGRAM_STORE unset): build graph, save snapshot.json, activate =="
( unset ENGRAM_STORE; "$BIN" seed "$DATA" ) || { echo "FAIL: seed"; fail=1; }
echo
echo "== 2) on (ENGRAM_STORE=1): import snapshot.json ONCE -> neuron.egm, resident-load, activate =="
ENGRAM_STORE=1 "$BIN" on "$DATA" || { echo "FAIL: on"; fail=1; }
[ -e "$DATA/neuron.egm" ] && echo " ok: neuron.egm created by import" || { echo "FAIL: neuron.egm missing"; fail=1; }
echo
echo "== 3) reboot (ENGRAM_STORE=1, snapshot.json DELETED): must load from neuron.egm, never JSON =="
rm -f "$DATA/snapshot.json"
ENGRAM_STORE=1 "$BIN" reboot "$DATA" || { echo "FAIL: reboot"; fail=1; }
echo
echo "== 4) parity comparison (modulo ordering) =="
python3 - "$DATA" <<'PY'
import json, sys, os
d = sys.argv[1]
def load(name):
with open(os.path.join(d, name)) as f: return json.load(f)
def norm_graph(g):
nodes = sorted(g.get("nodes", []), key=lambda n: n.get("id",""))
edges = sorted(g.get("edges", []), key=lambda e: e.get("id",""))
layers= sorted(g.get("layers", []), key=lambda l: l.get("layer_id",0))
return {"nodes":nodes, "edges":edges, "layers":layers}
def act_ids(a):
# list of (node id, promoted); robust set + ordered list
seq = [(e.get("node",{}).get("id",""), int(e.get("promoted",0))) for e in a]
return seq
rc = 0
snap = norm_graph(load("snapshot.json") if os.path.exists(os.path.join(d,"snapshot.json")) else load("off_graph.json"))
off = norm_graph(load("off_graph.json"))
on = norm_graph(load("on_graph.json"))
rebt = norm_graph(load("reboot_graph.json"))
def cmp(label, a, b):
global rc
if a == b:
print(f" PASS: {label} (nodes={len(a['nodes'])} edges={len(a['edges'])} layers={len(a['layers'])})")
else:
rc = 1
print(f" FAIL: {label}")
for k in ("nodes","edges","layers"):
if a[k] != b[k]:
print(f" {k}: {len(a[k])} vs {len(b[k])}")
for x,y in zip(a[k], b[k]):
if x != y:
print(f" first diff:\n A={json.dumps(x)[:300]}\n B={json.dumps(y)[:300]}")
break
cmp("graph: ENGRAM_STORE=1 (export) == ENGRAM_STORE=0 (JSON path)", on, off)
cmp("round-trip: snapshot.json seed == store export (on_graph)", on, off) # off_graph==snapshot save
cmp("reboot from neuron.egm (no JSON) == on-path store", rebt, on)
offa = act_ids(load("off_act.json"))
ona = act_ids(load("on_act.json"))
if set(offa) == set(ona):
print(f" PASS: activation result set identical (off={len(offa)} on={len(ona)} entries)")
if offa == ona:
print(" (and identical ordering/promotion sequence)")
else:
print(" (same set; ordering differs only where scores tie — reporting honestly)")
else:
rc = 1
print(" FAIL: activation result set differs")
print(f" off-only: {set(offa)-set(ona)}")
print(f" on-only: {set(ona)-set(offa)}")
sys.exit(rc)
PY
[ $? -ne 0 ] && fail=1
echo
echo "== 5) ASan+UBSan build, exercise M3 scan/boot/hooks (leaks off — harness intentionally leaks el_strdup) =="
SANBIN="$WORK/m3.san"
gcc -O1 -g -std=c11 -fsanitize=address,undefined -fno-sanitize-recover=undefined \
-I "$INC" "$HERE/test_m3_parity.c" "$RT" "$ST" -lcurl -o "$SANBIN" 2>"$WORK/san_cc.log"
if [ $? -ne 0 ]; then echo " SAN COMPILE FAILED:"; tail -20 "$WORK/san_cc.log"; fail=1; else
export ASAN_OPTIONS=detect_leaks=0
DATA2="$WORK/data2"; mkdir -p "$DATA2"
( unset ENGRAM_STORE; "$SANBIN" seed "$DATA2" ) >/dev/null 2>"$WORK/san_run.log" && \
ENGRAM_STORE=1 "$SANBIN" on "$DATA2" >/dev/null 2>>"$WORK/san_run.log" && \
{ rm -f "$DATA2/snapshot.json"; ENGRAM_STORE=1 "$SANBIN" reboot "$DATA2" >/dev/null 2>>"$WORK/san_run.log"; }
if grep -qiE 'runtime error|AddressSanitizer|UndefinedBehavior|ERROR: ' "$WORK/san_run.log"; then
echo " FAIL: sanitizer findings:"; grep -iE 'runtime error|Sanitizer|ERROR' "$WORK/san_run.log" | head; fail=1
else
echo " ok: ASan+UBSan clean across seed/on/reboot (scan, boot, resident-load, mutation hooks)"
fi
fi
echo
if [ "$fail" -eq 0 ]; then echo "================ M3 PARITY GATE: PASS ================"; else echo "================ M3 PARITY GATE: FAIL ================"; fi
rm -rf "$WORK"
exit $fail
+148
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@@ -0,0 +1,148 @@
/* test_m3_parity.c — M3 JSON-parity gate for the ENGRAM_STORE wiring.
*
* This is a REAL el-level harness: it links the actual el_runtime.o (the soul's
* native engram builtins) + engram_store.o and calls the engram_node family plus
* engram_connect, engram_activate_json, engram_save, engram_store_boot directly. No EL interpreter
* and no full soul build are needed — el_runtime.c compiles to a standalone .o
* whose engram builtins operate on the process-global engram store, and the
* string arena is inert unless el_request_start() is called, so the builtins are
* callable straight from C (el_val_t is int64_t; EL_STR/EL_CSTR are pointer casts).
*
* Modes (argv[1]), data dir (argv[2]):
* seed — ENGRAM_STORE unset: build a fixed seed graph, write snapshot.json +
* off_graph.json (pristine, pre-activation), then activate → off_act.json.
* on — ENGRAM_STORE=1: engram_store_boot(dir) imports snapshot.json ONCE into
* neuron.egm and loads it resident; write on_graph.json, then activate →
* on_act.json; checkpoint + close.
* reboot — ENGRAM_STORE=1 with snapshot.json DELETED: boot must reload from
* neuron.egm (WAL replay), never re-reading JSON; write reboot_graph.json.
* offcheck — assert flag-off leaves the store untouched.
*
* The graph comparison (done by run_m3_parity.sh via python, modulo ordering) is
* the deterministic gate; activation ids/promoted are compared as a robust set.
*/
#include "el_runtime.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
/* Builtins the header declares are pulled in via el_runtime.h. The M3 additions
* are not in the header yet, so declare them here. */
extern int engram_store_enabled(void);
extern el_val_t engram_store_boot(el_val_t data_dir);
extern el_val_t engram_store_checkpoint(void);
extern el_val_t engram_store_close(void);
extern el_val_t engram_node_layered(el_val_t content, el_val_t node_type, el_val_t label,
el_val_t salience, el_val_t certainty, el_val_t confidence,
el_val_t status, el_val_t tags, el_val_t layer_id);
static el_val_t S(const char* s){ return EL_STR(s); }
static el_val_t F(double d){ return el_from_float(d); }
/* Build a fixed, deterministic seed graph: 12 nodes across two layers + 9 edges.
* Content is chosen so an activation query has real matches to rank. */
static void build_seed(void){
/* core-identity layer (1) via engram_node_full */
el_val_t n0 = engram_node_full(S("tiered storage engine design"), S("Concept"),
S("storage-engine"), F(0.9), F(0.8), F(1.0), S("Semantic"), S("design,storage"));
el_val_t n1 = engram_node_full(S("write-ahead log durability"), S("Concept"),
S("wal"), F(0.85), F(0.75), F(1.0), S("Semantic"), S("wal,durability"));
el_val_t n2 = engram_node_full(S("paged buffer pool with checkpointing"), S("Concept"),
S("buffer-pool"), F(0.8), F(0.7), F(1.0), S("Semantic"), S("paging"));
el_val_t n3 = engram_node_full(S("spreading activation over the graph"), S("Concept"),
S("activation"), F(0.8), F(0.7), F(1.0), S("Semantic"), S("activation,graph"));
el_val_t n4 = engram_node_full(S("hebbian co-activation potentiation"), S("Concept"),
S("hebbian"), F(0.7), F(0.6), F(1.0), S("Semantic"), S("hebb"));
el_val_t n5 = engram_node_full(S("crash recovery replays the log"), S("Concept"),
S("recovery"), F(0.75), F(0.65), F(1.0), S("Semantic"), S("recovery,wal"));
/* domain-knowledge layer (2) via engram_node_layered */
el_val_t n6 = engram_node_layered(S("b-tree primary index id to location"), S("Fact"),
S("btree"), F(0.7), F(0.6), F(1.0), S(""), S("index"), (el_val_t)2);
el_val_t n7 = engram_node_layered(S("adjacency index for edge lookup"), S("Fact"),
S("adjacency"), F(0.7), F(0.6), F(1.0), S(""), S("index,graph"), (el_val_t)2);
el_val_t n8 = engram_node_layered(S("slotted pages hold tlv records"), S("Fact"),
S("slotted-page"), F(0.65), F(0.55), F(1.0), S(""), S("format"), (el_val_t)2);
el_val_t n9 = engram_node_full(S("memory tiers working semantic episodic"), S("Concept"),
S("tiers"), F(0.7), F(0.6), F(1.0), S("Semantic"), S("tiers,memory"));
el_val_t n10 = engram_node_full(S("embeddings enable nearest neighbour search"), S("Concept"),
S("embeddings"), F(0.65), F(0.55), F(1.0), S("Semantic"), S("embeddings"));
el_val_t n11 = engram_node_full(S("the durable engram is the mind's memory"), S("Belief"),
S("engram"), F(0.95), F(0.9), F(1.0), S("Semantic"), S("engram,memory"));
engram_connect(n0, n1, F(0.8), S("depends-on"));
engram_connect(n0, n2, F(0.8), S("depends-on"));
engram_connect(n0, n3, F(0.7), S("enables"));
engram_connect(n1, n5, F(0.9), S("enables"));
engram_connect(n3, n4, F(0.6), S("triggers"));
engram_connect(n2, n6, F(0.7), S("uses"));
engram_connect(n3, n7, F(0.7), S("uses"));
engram_connect(n0, n8, F(0.6), S("uses"));
engram_connect(n11, n9, F(0.8), S("about"));
engram_connect(n11, n10, F(0.5), S("about"));
}
static void write_file(const char* path, const char* content){
FILE* f = fopen(path, "wb");
if (!f){ fprintf(stderr, "cannot open %s\n", path); exit(2); }
if (content) fwrite(content, 1, strlen(content), f);
fclose(f);
}
static const char* QUERY = "storage engine activation and the durable log";
int main(int argc, char** argv){
if (argc < 3){ fprintf(stderr, "usage: %s <seed|on|reboot|offcheck> <dir>\n", argv[0]); return 2; }
const char* mode = argv[1];
const char* dir = argv[2];
char p[1024];
if (!strcmp(mode, "seed")){
if (engram_store_enabled()){ fprintf(stderr, "seed mode requires ENGRAM_STORE unset\n"); return 2; }
build_seed();
snprintf(p, sizeof p, "%s/snapshot.json", dir);
if (!engram_save(S(p))){ fprintf(stderr, "seed save failed\n"); return 2; }
snprintf(p, sizeof p, "%s/off_graph.json", dir);
engram_save(S(p)); /* pristine off-path graph */
el_val_t act = engram_activate_json(S(QUERY), (el_val_t)3);
snprintf(p, sizeof p, "%s/off_act.json", dir);
write_file(p, EL_CSTR(act));
printf("[seed] nodes=%lld edges=%lld\n",
(long long)(int64_t)engram_node_count(), (long long)(int64_t)engram_edge_count());
return 0;
}
if (!strcmp(mode, "on")){
if (!engram_store_enabled()){ fprintf(stderr, "on mode requires ENGRAM_STORE=1\n"); return 2; }
if (!engram_store_boot(S(dir))){ fprintf(stderr, "store boot failed\n"); return 2; }
snprintf(p, sizeof p, "%s/on_graph.json", dir);
engram_save(S(p)); /* export resident (== store) */
el_val_t act = engram_activate_json(S(QUERY), (el_val_t)3);
snprintf(p, sizeof p, "%s/on_act.json", dir);
write_file(p, EL_CSTR(act));
printf("[on] nodes=%lld edges=%lld\n",
(long long)(int64_t)engram_node_count(), (long long)(int64_t)engram_edge_count());
engram_store_checkpoint();
engram_store_close();
return 0;
}
if (!strcmp(mode, "reboot")){
if (!engram_store_enabled()){ fprintf(stderr, "reboot mode requires ENGRAM_STORE=1\n"); return 2; }
/* snapshot.json has been deleted by the runner — boot MUST come from
* neuron.egm (+ WAL replay), never re-reading JSON. */
if (!engram_store_boot(S(dir))){ fprintf(stderr, "reboot boot failed\n"); return 2; }
snprintf(p, sizeof p, "%s/reboot_graph.json", dir);
engram_save(S(p));
printf("[reboot] nodes=%lld edges=%lld\n",
(long long)(int64_t)engram_node_count(), (long long)(int64_t)engram_edge_count());
engram_store_close();
return 0;
}
if (!strcmp(mode, "offcheck")){
/* ENGRAM_STORE unset: enabled()==0 and boot is a no-op returning 0. */
int en = engram_store_enabled();
el_val_t b = engram_store_boot(S(dir));
printf("[offcheck] enabled=%d boot_ret=%lld\n", en, (long long)(int64_t)b);
return (en == 0 && (int64_t)b == 0) ? 0 : 1;
}
fprintf(stderr, "unknown mode %s\n", mode);
return 2;
}
+7 -7
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@@ -6,7 +6,7 @@
*
* Covers §7/M2 gates:
* 1 replay parity — random op stream: normal-durable path == crash-recover path
* 2 torn-tail fuzz — truncate engram.wal at EVERY byte offset → never crash,
* 2 torn-tail fuzz — truncate neuron.wal at EVERY byte offset → never crash,
* recover to the last intact record (contiguous prefix)
* 3 checkpoint-crash — kill at each checkpoint phase → converge, no loss past fsync
* 4 torn-page + WAL — corrupt a store page under WAL coverage → redo re-derives
@@ -215,19 +215,19 @@ static void test_replay_parity(void){
/* ═══════════════════════════ TEST 2 — torn-tail fuzz ═══════════════════════ */
#define TT_NODES 14
static void test_torn_tail(void){
printf("\n== torn-tail fuzz: truncate engram.wal at every byte offset ==\n");
printf("\n== torn-tail fuzz: truncate neuron.wal at every byte offset ==\n");
char base[600]; mk_dir("tornbase", base, sizeof base);
EngramPagedStore* s = engram_open(base);
for (int i=0;i<TT_NODES;i++){ StoreNode n; gen_node(i,0,&n); store_put_node(s,&n); store_node_free(&n); }
store__crash(s); /* leave store(at ckpt) + full WAL on disk */
char sp[700], wp[700]; snprintf(sp,sizeof sp,"%s/engram.store",base); snprintf(wp,sizeof wp,"%s/engram.wal",base);
char sp[700], wp[700]; snprintf(sp,sizeof sp,"%s/neuron.egm",base); snprintf(wp,sizeof wp,"%s/neuron.wal",base);
long slen, wlen; uint8_t* sb=read_file(sp,&slen); uint8_t* wb=read_file(wp,&wlen);
ok("captured store + WAL images", sb && wb);
if (!sb || !wb) return;
char work[600]; mk_dir("tornwork", work, sizeof work);
char wsp[700], wwp[700]; snprintf(wsp,sizeof wsp,"%s/engram.store",work); snprintf(wwp,sizeof wwp,"%s/engram.wal",work);
char wsp[700], wwp[700]; snprintf(wsp,sizeof wsp,"%s/neuron.egm",work); snprintf(wwp,sizeof wwp,"%s/neuron.wal",work);
int crashes=0, dirty_check=0, non_prefix=0, full_recovered=0;
for (long t=0; t<=wlen; t++){
@@ -300,7 +300,7 @@ static void test_torn_page(void){
/* corrupt the highest-id NODE data page on disk (its records are post-checkpoint,
* so the WAL still covers them). */
char sp[700]; snprintf(sp,sizeof sp,"%s/engram.store",dir);
char sp[700]; snprintf(sp,sizeof sp,"%s/neuron.egm",dir);
long slen; uint8_t* sb=read_file(sp,&slen);
long pages = slen/16384;
long victim = -1;
@@ -379,8 +379,8 @@ static void test_legacy_import(void){
EngramPagedStore* s = engram_open(dir); /* store absent + snapshot present → import */
ok("engram_open imported the snapshot", s!=NULL);
char sp[700]; snprintf(sp,sizeof sp,"%s/engram.store",dir); struct stat st;
ok("engram.store created by import", stat(sp,&st)==0);
char sp[700]; snprintf(sp,sizeof sp,"%s/neuron.egm",dir); struct stat st;
ok("neuron.egm created by import", stat(sp,&st)==0);
if (!s) return;
int nmiss=0, embmiss=0;