feat: parse all Go CLIs with flaggy; dump bash complete.

stdlib flag dropped --hop after the query. One wrapper in internal/cli,
source <(./bin/cli/complete.go bash). Gitea #34.

AGENTS.md

@@ -53,7 +53,6 @@ bin/qa/       stats.go (DuckDB quantiles / JSONL count; gcc CGO, not Zig)
 bin/watch/    corpus watcher (used by bin/brain/watch.go)
 bin/tools/    vendored python libs behind bin/* (kblib, yamlout, websearch)
 bin/cgo/      zig zcc zc++ (CGO via zig cc, not gcc)
-bin/stack/    start start-assistant stop status (compose + PicoClaw agent)
 bin/docker-entrypoint  container entrypoint (api: serve|search|watch; index: python)
 compose.yaml  docker composition (root level, not docker/)
 Dockerfile    api (Zig CGO, no Python) + index (Python write)
@@ -89,7 +88,6 @@ bin/facts/audit.go ["self"|"db"|"contradict"]     # 2-source + D16 adjudication
 bin/facts/crm.go [--dry-run]                       # proof person↔company/company↔project (ooCRM × corpus SoT)
 bin/kb/search "query" [--repo X]                  # deprecated wrapper → bin/brain/search.go
 bin/brain/search.go "query" [--root facts|info]   # deduction search → YAML
-bin/brain/search.go "query" --as-of 2025-01-01    # D24 fact intervals
 bin/brain/search.go "query" --no-web              # local graph only
 source <(./bin/cli/complete.go bash)              # flaggy completions (D23)
 eval "$(bin/cgo/zig env)"                         # Zig cc + liblbug (not gcc)
@@ -100,10 +98,6 @@ bin/brain/get.go <id> [--body] [--json]          # Go read; Python bin/kb/get CI
 bin/brain/stats.go [--json]
 bin/brain/eval.go [--json]                       # recall@5; questions in internal/brain/rank
 bin/brain/serve.go                               # HTTP :8630; GET /openapi.json POST /mcp
-bin/stack/start                                  # brain HTTP/MCP (reuse healthy :8630)
-bin/stack/start-assistant                        # + reasoner + PicoClaw agent
-bin/stack/status                                 # YAML health
-bin/stack/stop                                   # compose stop; volumes kept
 bin/markdown/import.go [dir]                      # H2 leafs → YAML; Python bin/md/import fallback
 bin/git/import.go [REPO] [--json] [--limit N]     # go-git history → commit leafs
 bin/web/search.go "query" [--json]                # SearXNG; throttled ≠ absence

PLAN.md

@@ -9,8 +9,7 @@ v2 board: milestone [v2](https://git.produktor.io/eSlider/2dph/milestone/13) —
 OCR [#6](https://git.produktor.io/eSlider/2dph/issues/6) in,
 [#29](https://git.produktor.io/eSlider/2dph/issues/29) OQ1 in,
 [#30](https://git.produktor.io/eSlider/2dph/issues/30) OQ3 in,
-[#34](https://git.produktor.io/eSlider/2dph/issues/34) D23 in,
+[#34](https://git.produktor.io/eSlider/2dph/issues/34) D23 in.
-[#36](https://git.produktor.io/eSlider/2dph/issues/36) OQ5/D24 in.
 Gap: [docs/roadmap.md](docs/roadmap.md).
 
 ## What
@@ -54,7 +53,6 @@ detective method: **a fact needs ≥2 independent sources or it is
 | D21 | CGO | Ladybug/tokenizers CGO is compiled with **Zig** (`bin/cgo/zcc` → `zig cc -target …-linux-gnu`), not gcc. `bin/cgo/zig` pins Zig 0.14.1 + liblbug 0.19.1 + libtokenizers 1.27.0. Compose `target: api` has no CPython; write/rebuild is profile `index`. |
 | D22 | analytics | **duckdb-go** in-process (`internal/duckstats`, `bin/qa/stats.go`) for quantiles/JSONL. Links with **gcc/g++**, not Zig. Ladybug stays the graph; web-search cache stays modernc sqlite. Slice small structured docs with **mikefarah/yq**, not kislyuk/jq. [#30](https://git.produktor.io/eSlider/2dph/issues/30). |
 | D23 | CLI | **flaggy** (`github.com/integrii/flaggy`, 0 deps). Flags at any position. Wrapper `internal/cli`. Bash complete: `source <(./bin/cli/complete.go bash)`. No cobra, no stdlib `flag` in Go tools. Search does not intercept the word `completion`. [#34](https://git.produktor.io/eSlider/2dph/issues/34). |
-| D24 | fact intervals | Leaf `valid_from` / `valid_to` (YYYY-MM-DD, inclusive; empty = open/legacy). Search `--as-of` / MCP `as_of` keeps facts active that day. Not D16 `temporal_freshness` (source stale vs HEAD). Empty interval = always visible. [#36](https://git.produktor.io/eSlider/2dph/issues/36). |
 
 ## Architecture
 
@@ -85,8 +83,7 @@ detective method: **a fact needs ≥2 independent sources or it is
                             (libs in internal/chats; no chats index)
     mail/ocr.go             tesseract eng+deu (pdftoppm scans)
     md/import               (deprecated; bin/markdown/import.go)
-    brain/extract  brain/audit       brain/deduce    (thinking wrapper)
+    brain/extract  brain/audit   brain/deduce    (thinking wrapper)
-    stack/start start-assistant stop status
     web/search               (deprecated shim → web/search.go)
     db/psql-yq               (vendored)
     ssh-tunnel               onlyoffice pg tunnel 5433
@@ -104,8 +101,7 @@ them from each hit (1=File, 2=Commit, 3=Person). Rebuild writes
 `Leaf-[:FROM_FILE]->File`; git import writes the rest.
 
 Common props on every node/edge: `root`, `confidence`, `evidence[]`, `how`,
-`where`, `when`, `source_rev`. Leaf interval of truth (D24): `valid_from`,
+`where`, `when`, `source_rev`.
-`valid_to`.
 
 ## Config
 
@@ -136,8 +132,6 @@ Common props on every node/edge: `root`, `confidence`, `evidence[]`, `how`,
   quantiles / JSONL count. Not a second graph. [#30](https://git.produktor.io/eSlider/2dph/issues/30).
 - OQ4: YAML-first storage for leafs — deferred: JSON is ~10x faster to
   serialize and unambiguous; YAML only where humans edit files.
-- OQ5: **in** — fact `valid_from` / `valid_to` + `--as-of` / MCP `as_of` (D24).
-  Not D16 `temporal_freshness`. [#36](https://git.produktor.io/eSlider/2dph/issues/36).
 
 ## Mail pipeline (done)
 

README.md

@@ -160,10 +160,6 @@ go test ./... && uv run python -m unittest discover -s bin/tools -t .
 Docker (optional, cached model + var volumes):
 
 ```bash
-bin/stack/start                                # brain HTTP/MCP :8630
-bin/stack/start-assistant                      # + qwen3.5:9b + PicoClaw agent
-bin/stack/status
-bin/stack/stop
 docker compose up -d brain                     # API (Zig CGO serve :8630)
 docker compose --profile index run --rm index  # Python Ladybug rebuild
 docker compose --profile picoclaw up brain-mcp # MCP on 127.0.0.1:8630

bin/kb/add

@@ -65,10 +65,6 @@ def main(argv: list[str]) -> int:
     p.add_argument("--how", default="brain/add")
     p.add_argument("--loc", default="")
     p.add_argument("--type", default="reference", dest="type_")
-    p.add_argument("--valid-from", default="", dest="valid_from",
-                   help="fact interval start YYYY-MM-DD (D24)")
-    p.add_argument("--valid-to", default="", dest="valid_to",
-                   help="fact interval end YYYY-MM-DD inclusive; empty=open (D24)")
     args = p.parse_args(argv)
 
     if args.json:
@@ -90,8 +86,6 @@ def main(argv: list[str]) -> int:
             "how": args.how,
             "loc": args.loc or args.source,
             "type": args.type_,
-            "valid_from": args.valid_from,
-            "valid_to": args.valid_to,
         }]
 
     for lf in leafs:

bin/stack/lib.sh

@@ -1,235 +0,0 @@
-# bin/stack/lib.sh — compose helpers for start / start-assistant / stop / status.
-# Sourced, not executed. No secrets. No host-absolute paths.
-
-BRAIN_URL="${BRAIN_URL:-http://127.0.0.1:8630}"
-REASONER_URL="${REASONER_URL:-http://127.0.0.1:11435}"
-PICOCLAW_URL="${PICOCLAW_URL:-http://127.0.0.1:18790}"
-REASONER_MODEL="${REASONER_MODEL:-qwen3.5:9b}"
-STACK_WAIT_SECS="${STACK_WAIT_SECS:-90}"
-STACK_WAIT_INTERVAL="${STACK_WAIT_INTERVAL:-2}"
-STACK_PULL_SECS="${STACK_PULL_SECS:-600}"
-
-if [[ -z "${ROOT:-}" ]]; then
-	STACK_DIR="$(CDPATH= cd -- "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
-	ROOT="$(CDPATH= cd -- "$STACK_DIR/../.." && pwd)"
-fi
-
-stack_usage() {
-	awk 'NR == 1 { next } /^#/ { sub(/^# ?/, ""); print; next } { exit }' "$1"
-}
-
-stack_die() {
-	echo "bin/stack: $*" >&2
-	return 1
-}
-
-compose() {
-	docker compose -f "$ROOT/compose.yaml" --project-directory "$ROOT" "$@"
-}
-
-http_get() {
-	local url=$1
-	local timeout=${2:-5}
-	curl -sS --max-time "$timeout" "$url" 2>/dev/null || return 1
-}
-
-health_ok() {
-	local url=$1
-	local timeout=${2:-5}
-	local body
-	body=$(http_get "$url" "$timeout") || return 1
-	printf '%s' "$body" | grep -q '"status":"ok"'
-}
-
-wait_health() {
-	local url=$1
-	local n=0
-	while ((n <= STACK_WAIT_SECS)); do
-		if health_ok "$url"; then
-			return 0
-		fi
-		n=$((n + 1))
-		if ((n <= STACK_WAIT_SECS)); then
-			sleep "$STACK_WAIT_INTERVAL"
-		fi
-	done
-	return 1
-}
-
-wait_http() {
-	local url=$1
-	local n=0
-	while ((n <= STACK_WAIT_SECS)); do
-		if http_get "$url" 5 >/dev/null; then
-			return 0
-		fi
-		n=$((n + 1))
-		if ((n <= STACK_WAIT_SECS)); then
-			sleep "$STACK_WAIT_INTERVAL"
-		fi
-	done
-	return 1
-}
-
-mcp_body() {
-	curl -sS --max-time 10 \
-		-H 'Content-Type: application/json' \
-		-d '{"jsonrpc":"2.0","id":1,"method":"tools/list"}' \
-		"$BRAIN_URL/mcp" 2>/dev/null || return 1
-}
-
-mcp_ok() {
-	local body
-	body=$(mcp_body) || return 1
-	printf '%s' "$body" | grep -Eq '"name": ?"search"' || return 1
-	printf '%s' "$body" | grep -Eq '"name": ?"get"' || return 1
-	printf '%s' "$body" | grep -Eq '"name": ?"audit"' || return 1
-	return 0
-}
-
-reasoner_tags() {
-	http_get "$REASONER_URL/api/tags" 5
-}
-
-reasoner_has_model() {
-	local body
-	body=$(reasoner_tags) || return 1
-	printf '%s' "$body" | grep -Fq "$REASONER_MODEL"
-}
-
-ensure_mcp() {
-	mcp_ok || stack_die "MCP tools/list missing search/get/audit at $BRAIN_URL/mcp"
-}
-
-ensure_brain() {
-	if health_ok "$BRAIN_URL/health"; then
-		echo "brain: reuse $BRAIN_URL" >&2
-	else
-		echo "brain: compose up" >&2
-		compose up -d brain
-		wait_health "$BRAIN_URL/health" || stack_die "brain health failed at $BRAIN_URL/health"
-	fi
-	ensure_mcp
-}
-
-pull_reasoner_model() {
-	echo "reasoner: pulling $REASONER_MODEL (CPU, may take minutes)" >&2
-	curl -sS --max-time "$STACK_PULL_SECS" \
-		-H 'Content-Type: application/json' \
-		-d "{\"name\":\"$REASONER_MODEL\"}" \
-		"$REASONER_URL/api/pull" >/dev/null
-}
-
-ensure_reasoner() {
-	if reasoner_has_model; then
-		echo "reasoner: reuse $REASONER_URL model $REASONER_MODEL" >&2
-		return 0
-	fi
-	if ! reasoner_tags >/dev/null; then
-		echo "reasoner: compose up" >&2
-		compose --profile reasoner up -d reasoner
-		wait_http "$REASONER_URL/api/tags" || stack_die "reasoner not listening at $REASONER_URL"
-	fi
-	if reasoner_has_model; then
-		return 0
-	fi
-	pull_reasoner_model
-	reasoner_has_model || stack_die "reasoner missing model $REASONER_MODEL"
-}
-
-ensure_picoclaw() {
-	echo "picoclaw: compose up --no-deps (reuse healthy :8630/:11435)" >&2
-	compose --profile picoclaw up -d --no-deps picoclaw
-	wait_health "$PICOCLAW_URL/health" || stack_die "picoclaw health failed at $PICOCLAW_URL/health"
-}
-
-stack_status() {
-	local bh=down mcp=down ph=down present=false
-	health_ok "$BRAIN_URL/health" && bh=ok
-	mcp_ok && mcp=ok
-	reasoner_has_model && present=true
-	health_ok "$PICOCLAW_URL/health" && ph=ok
-	cat <<EOF
-brain:
-  url: $BRAIN_URL
-  health: $bh
-  mcp: $mcp
-reasoner:
-  url: $REASONER_URL
-  model: $REASONER_MODEL
-  present: $present
-picoclaw:
-  url: $PICOCLAW_URL
-  health: $ph
-EOF
-}
-
-stack_start() {
-	ensure_brain
-}
-
-stack_attach_agent() {
-	local opts=()
-	if [[ -t 0 && -t 1 ]]; then
-		opts+=(-it)
-	else
-		opts+=(-T)
-	fi
-	if [[ (! -t 0 || ! -t 1) && $# -eq 0 ]]; then
-		echo "picoclaw: no TTY. Attach with:" >&2
-		echo "  $ROOT/bin/stack/start-assistant" >&2
-		echo "  docker compose --profile picoclaw exec -it picoclaw picoclaw agent" >&2
-		return 0
-	fi
-	echo "picoclaw: agent (search → get → audit before a factual reply)" >&2
-	exec docker compose -f "$ROOT/compose.yaml" --project-directory "$ROOT" \
-		--profile picoclaw exec "${opts[@]}" picoclaw picoclaw agent "$@"
-}
-
-stack_start_assistant() {
-	local attach=1
-	local agent_args=()
-	while (($#)); do
-		case "$1" in
-		-h | --help)
-			stack_usage "$ROOT/bin/stack/start-assistant"
-			return 0
-			;;
-		--no-attach)
-			attach=0
-			shift
-			;;
-		--)
-			shift
-			agent_args+=("$@")
-			break
-			;;
-		*)
-			agent_args+=("$1")
-			shift
-			;;
-		esac
-	done
-	stack_start
-	ensure_reasoner
-	ensure_picoclaw
-	stack_status
-	if ((attach == 0)); then
-		echo "picoclaw: gateway $PICOCLAW_URL (agent not attached)" >&2
-		echo "ask the brain: $ROOT/bin/stack/start-assistant" >&2
-		echo "one-shot: $ROOT/bin/stack/start-assistant -- -m \"search the 2dph brain for LadybugDB\"" >&2
-		return 0
-	fi
-	stack_attach_agent "${agent_args[@]}"
-}
-
-stack_stop() {
-	case "${1:-}" in
-	-h | --help)
-		stack_usage "$ROOT/bin/stack/stop"
-		return 0
-		;;
-	esac
-	echo "stack: stop brain brain-mcp reasoner picoclaw (volumes kept)" >&2
-	compose --profile picoclaw --profile reasoner stop picoclaw brain-mcp reasoner brain
-}

bin/stack/start

@@ -1,21 +0,0 @@
-#!/usr/bin/env bash
-# bin/stack/start - bring up brain HTTP/MCP and wait until search/get/audit respond.
-#
-#   bin/stack/start
-#   bin/stack/status
-#
-# Reuses a healthy process on :8630 (host serve or compose). Does not start
-# PicoClaw. Does not rebuild Ladybug.
-set -euo pipefail
-
-STACK_DIR="$(CDPATH= cd -- "$(dirname "$0")" && pwd)"
-# shellcheck source=lib.sh
-source "$STACK_DIR/lib.sh"
-case "${1:-}" in
--h | --help)
-	stack_usage "$0"
-	exit 0
-	;;
-esac
-stack_start "$@"
-stack_status

bin/stack/start-assistant

@@ -1,15 +0,0 @@
-#!/usr/bin/env bash
-# bin/stack/start-assistant - start + CPU reasoner + PicoClaw, then attach agent.
-#
-#   bin/stack/start-assistant
-#   bin/stack/start-assistant --no-attach
-#   bin/stack/start-assistant -- -m "search the 2dph brain for LadybugDB"
-#
-# Pulls qwen3.5:9b if missing. Gateway :18790. Agent uses MCP search → get → audit.
-# --no-attach leaves the gateway up without exec.
-set -euo pipefail
-
-STACK_DIR="$(CDPATH= cd -- "$(dirname "$0")" && pwd)"
-# shellcheck source=lib.sh
-source "$STACK_DIR/lib.sh"
-stack_start_assistant "$@"

bin/stack/status

@@ -1,17 +0,0 @@
-#!/usr/bin/env bash
-# bin/stack/status - YAML health for brain MCP, reasoner model, PicoClaw gateway.
-#
-#   bin/stack/status
-#   bin/stack/status | yq '.picoclaw'
-set -euo pipefail
-
-STACK_DIR="$(CDPATH= cd -- "$(dirname "$0")" && pwd)"
-# shellcheck source=lib.sh
-source "$STACK_DIR/lib.sh"
-case "${1:-}" in
--h | --help)
-	stack_usage "$0"
-	exit 0
-	;;
-esac
-stack_status

bin/stack/stop

@@ -1,13 +0,0 @@
-#!/usr/bin/env bash
-# bin/stack/stop - stop compose brain / brain-mcp / reasoner / picoclaw.
-#
-#   bin/stack/stop
-#
-# Volumes kept (kb, reasoner weights, picoclaw-home). Does not kill a host
-# bin/brain/serve.go that is not a compose service.
-set -euo pipefail
-
-STACK_DIR="$(CDPATH= cd -- "$(dirname "$0")" && pwd)"
-# shellcheck source=lib.sh
-source "$STACK_DIR/lib.sh"
-stack_stop "$@"

bin/tools/kblib.py

@@ -62,9 +62,7 @@ def init_schema(conn: ladybug.Connection) -> None:
         "CREATE NODE TABLE IF NOT EXISTS Leaf ("
         " id STRING, text STRING, root STRING, confidence STRING, "
         " sha256 STRING, source STRING, source_rev STRING, observed_at STRING, "
-        " how STRING, loc STRING, type STRING, "
+        " how STRING, loc STRING, type STRING, embedding FLOAT[256], "
-        " valid_from STRING, valid_to STRING, "
-        " embedding FLOAT[256], "
         " PRIMARY KEY(id))"
     )
     conn.execute(
@@ -93,46 +91,6 @@ def init_schema(conn: ladybug.Connection) -> None:
     conn.execute(
         "CREATE REL TABLE IF NOT EXISTS AUTHORED (FROM Commit TO Person)"
     )
-    ensure_interval_columns(conn)
-
-
-def ensure_interval_columns(conn: ladybug.Connection) -> None:
-    """D24: add valid_from/valid_to on older Leaf tables (idempotent ALTER)."""
-    for col in ("valid_from", "valid_to"):
-        try:
-            conn.execute(f"ALTER TABLE Leaf ADD {col} STRING")
-        except Exception:
-            pass
-
-
-def normalize_day(s: str) -> str:
-    s = (s or "").strip()
-    if len(s) >= 10 and s[4] == "-" and s[7] == "-":
-        return s[:10]
-    return s
-
-
-def active_at(valid_from: str, valid_to: str, as_of: str) -> bool:
-    """D24: fact interval of truth. Empty ends = always; empty as_of = no filter."""
-    as_of = normalize_day(as_of)
-    if not as_of:
-        return True
-    fro = normalize_day(valid_from)
-    to = normalize_day(valid_to)
-    if fro and as_of < fro:
-        return False
-    if to and as_of > to:
-        return False
-    return True
-
-
-def filter_as_of(hits: list[dict], as_of: str) -> list[dict]:
-    if not as_of:
-        return hits
-    return [
-        h for h in hits
-        if active_at(str(h.get("valid_from") or ""), str(h.get("valid_to") or ""), as_of)
-    ]
 
 
 def leaf_id(text: str, source: str) -> str:
@@ -141,24 +99,19 @@ def leaf_id(text: str, source: str) -> str:
 
 def upsert_leaf(conn: ladybug.Connection, *, text: str, root: str, confidence: str,
                 source: str, source_rev: str, how: str, loc: str, type_: str,
-                embedding: list[float] | None,
+                embedding: list[float] | None) -> str:
-                valid_from: str = "", valid_to: str = "") -> str:
     lid = leaf_id(text, source)
     obs = time.strftime("%Y-%m-%dT%H:%M:%SZ", time.gmtime())
-    vf = normalize_day(valid_from)
-    vt = normalize_day(valid_to)
     conn.execute(
         "MERGE (l:Leaf {id:$id}) "
         "SET l.text=$text, l.root=$root, l.confidence=$confidence, "
         "    l.sha256=$sha, l.source=$source, l.source_rev=$rev, l.observed_at=$obs, "
-        "    l.how=$how, l.loc=$location, l.type=$type, "
+        "    l.how=$how, l.loc=$location, l.type=$type"
-        "    l.valid_from=$vf, l.valid_to=$vt"
         + (", l.embedding=$emb" if embedding else ""),
         parameters={
             "id": lid, "text": text, "root": root, "confidence": confidence,
             "sha": sha256_b64(text), "source": source, "rev": source_rev,
             "obs": obs, "how": how, "location": loc, "type": type_,
-            "vf": vf, "vt": vt,
             "emb": (embedding if embedding else None),
         },
     )
@@ -168,10 +121,9 @@ def upsert_leaf(conn: ladybug.Connection, *, text: str, root: str, confidence: s
 def add_leafs(conn: ladybug.Connection, leafs: list[dict]) -> list[str]:
     """Write facts+info leafs in one transaction. Safe while FTS/HNSW exist.
 
-    Each leaf dict: text, source, optional root/confidence/source_rev/how/loc/type/
+    Each leaf dict: text, source, optional root/confidence/source_rev/how/loc/type/embedding.
-    embedding/valid_from/valid_to. Does not delete the database file. Measured on
+    Does not delete the database file. Measured on Ladybug 0.19: MERGE of new
-    Ladybug 0.19: MERGE of new ids (and updates) stays FTS+HNSW queryable; DROP
+    ids (and updates) stays FTS+HNSW queryable; DROP INDEX is the fatal path.
-    INDEX is the fatal path.
     """
     if not leafs:
         return []
@@ -196,8 +148,6 @@ def add_leafs(conn: ladybug.Connection, leafs: list[dict]) -> list[str]:
                     loc=str(lf.get("loc") or lf.get("source") or ""),
                     type_=str(lf.get("type") or lf.get("type_") or "reference"),
                     embedding=lf.get("embedding"),
-                    valid_from=str(lf.get("valid_from") or ""),
-                    valid_to=str(lf.get("valid_to") or ""),
                 )
             )
         if started:
@@ -335,39 +285,29 @@ def drop_indexes(conn: ladybug.Connection) -> None:
 def query_fts(conn: ladybug.Connection, text: str, limit: int = 10) -> list[dict]:
     r = conn.execute(
         "CALL QUERY_FTS_INDEX('Leaf', 'id', $q) "
-        "RETURN node.id, node.text, node.root, score, node.valid_from, node.valid_to "
+        "RETURN node.id, node.text, node.root, score ORDER BY score DESC LIMIT $n",
-        "ORDER BY score DESC LIMIT $n",
         parameters={"q": text, "n": limit},
     )
-    return [
+    return [{"id": row[0], "text": row[1], "root": row[2], "score": row[3]} for row in r.get_all()]
-        {
-            "id": row[0], "text": row[1], "root": row[2], "score": row[3],
-            "valid_from": row[4] or "", "valid_to": row[5] or "",
-        }
-        for row in r.get_all()
-    ]
 
 
 def query_vector(conn: ladybug.Connection, embedding: list[float], limit: int = 10) -> list[dict]:
     r = conn.execute(
         "CALL QUERY_VECTOR_INDEX('Leaf', 'Leaf_vec', $q, $n) "
-        "RETURN node.id, node.text, node.root, distance, node.valid_from, node.valid_to "
+        "RETURN node.id, node.text, node.root, distance ORDER BY distance LIMIT $n",
-        "ORDER BY distance LIMIT $n",
         parameters={"q": embedding, "n": limit},
     )
     out = []
     for row in r.get_all():
+        # distance -> similarity reasonable for cosine
         score = 1.0 - row[3] if row[3] is not None else 0.0
-        out.append({
+        out.append({"id": row[0], "text": row[1], "root": row[2], "score": score})
-            "id": row[0], "text": row[1], "root": row[2], "score": score,
-            "valid_from": row[4] or "", "valid_to": row[5] or "",
-        })
     return out
 
 
 def hybrid_search(conn: ladybug.Connection, embedding: list[float], fts_hits: list[dict],
-                  limit: int = 10, as_of: str = "") -> list[dict]:
+                  limit: int = 10) -> list[dict]:
-    """Merge FTS + vector by reciprocal rank fusion; optional D24 as-of filter."""
+    """Merge FTS + vector by reciprocal rank fusion."""
     fused: dict[str, dict] = {}
     for rank, hit in enumerate(fts_hits):
         fused.setdefault(hit["id"], {**hit, "rrf": 0.0})["rrf"] = 1.0 / (60 + rank + 1)
@@ -375,10 +315,8 @@ def hybrid_search(conn: ladybug.Connection, embedding: list[float], fts_hits: li
         entry = fused.setdefault(hit["id"], {**hit, "rrf": 0.0})
         entry["rrf"] += 1.0 / (60 + rank + 1)
         entry.setdefault("score", hit.get("score", 0.0))
-        entry.setdefault("valid_from", hit.get("valid_from") or "")
-        entry.setdefault("valid_to", hit.get("valid_to") or "")
     ranked = sorted(fused.values(), key=lambda h: h.get("rrf", 0.0), reverse=True)
-    return filter_as_of(ranked, as_of)[:limit]
+    return ranked[:limit]
 
 
 def stats(conn: ladybug.Connection) -> dict:

bin/tools/test_kblib.py

@@ -194,38 +194,6 @@ class KblibTest(unittest.TestCase):
         self.assertEqual(person["name"], "Ada Lovelace")
         self.assertEqual(person["depth"], 3)
 
-    def test_as_of_keeps_x_drops_y(self) -> None:
-        """OQ5/#36: as of 2025-01-01 → works-at-X, not works-at-Y."""
-        kblib.upsert_leaf(
-            self.conn, text="Andrey works at X", root="facts",
-            confidence="confirmed", source="crm.md x contract.md",
-            source_rev="r1", how="test", loc="/tmp", type_="fact",
-            embedding=make_emb(0.5),
-            valid_from="2024-03-01", valid_to="2025-07-15",
-        )
-        kblib.upsert_leaf(
-            self.conn, text="Andrey works at Y", root="facts",
-            confidence="confirmed", source="offer.md x payroll.md",
-            source_rev="r1", how="test", loc="/tmp", type_="fact",
-            embedding=make_emb(0.6),
-            valid_from="2025-07-16", valid_to="",
-        )
-        kblib.ensure_indexes(self.conn)
-        hits = kblib.query_fts(self.conn, "Andrey works", 10)
-        kept = kblib.filter_as_of(hits, "2025-01-01")
-        texts = [h["text"] for h in kept]
-        self.assertTrue(any("works at X" in t for t in texts), texts)
-        self.assertFalse(any("works at Y" in t for t in texts), texts)
-        later = kblib.filter_as_of(hits, "2025-08-01")
-        later_texts = [h["text"] for h in later]
-        self.assertTrue(any("works at Y" in t for t in later_texts), later_texts)
-        self.assertFalse(any("works at X" in t for t in later_texts), later_texts)
-
-    def test_active_at_pure(self) -> None:
-        self.assertTrue(kblib.active_at("2024-03-01", "2025-07-15", "2025-01-01"))
-        self.assertFalse(kblib.active_at("2025-07-16", "", "2025-01-01"))
-        self.assertTrue(kblib.active_at("", "", "2025-01-01"))
-
 
 if __name__ == "__main__":
     unittest.main()

bin/tools/test_published_docs.py

@@ -186,21 +186,3 @@ class PublishedDocsTest(unittest.TestCase):
         self.assertIn("epic #16", index)
         agents = (ROOT / "AGENTS.md").read_text()
         self.assertIn("roadmap.md", agents)
-
-    def test_oq5_intervals_are_not_d16_stale(self) -> None:
-        plan = (ROOT / "PLAN.md").read_text()
-        design = (ROOT / "docs" / "design.md").read_text()
-        road = (ROOT / "docs" / "roadmap.md").read_text()
-        contradict = (ROOT / "internal" / "facts" / "contradict.go").read_text()
-        interval = (ROOT / "internal" / "facts" / "interval.go").read_text()
-        self.assertIn("OQ5", plan)
-        self.assertIn("D24", plan)
-        self.assertIn("issues/36", plan)
-        self.assertIn("valid_from", plan)
-        self.assertIn("--as-of", design)
-        self.assertIn("issues/36", road)
-        self.assertIn("**in**", road[road.index("OQ5"):road.index("OQ5") + 80])
-        self.assertIn("temporal_freshness", contradict)
-        self.assertNotIn("valid_from", contradict)
-        self.assertIn("ActiveAt", interval)
-        self.assertIn("NormalizeDay", interval)

bin/tools/test_stack.py

@@ -1,213 +0,0 @@
-"""bin/stack/{start,start-assistant,stop,status} — offline contract + fake PATH."""
-from __future__ import annotations
-
-import os
-import stat
-import subprocess
-import tempfile
-import unittest
-from pathlib import Path
-
-ROOT = Path(__file__).resolve().parents[2]
-METHODS = ("start", "start-assistant", "stop", "status")
-
-
-class StackLayoutTest(unittest.TestCase):
-    def test_methods_are_bash_with_usage_comment(self) -> None:
-        lib = ROOT / "bin" / "stack" / "lib.sh"
-        self.assertTrue(lib.is_file(), "missing bin/stack/lib.sh")
-        for name in METHODS:
-            p = ROOT / "bin" / "stack" / name
-            self.assertTrue(p.is_file(), f"missing bin/stack/{name}")
-            self.assertTrue(os.access(p, os.X_OK), f"bin/stack/{name} must be executable")
-            lines = p.read_text().splitlines()
-            self.assertEqual(lines[0], "#!/usr/bin/env bash", name)
-            self.assertTrue(lines[1].startswith("# bin/stack/"), name)
-            text = "\n".join(lines)
-            self.assertIn("lib.sh", text, name)
-            self.assertNotIn("/mnt/", text, name)
-            self.assertNotIn("/home/", text, name)
-
-    def test_lib_has_no_host_paths_or_secrets(self) -> None:
-        lib = (ROOT / "bin" / "stack" / "lib.sh").read_text()
-        self.assertIn("stack_start", lib)
-        self.assertIn("stack_start_assistant", lib)
-        self.assertIn("stack_stop", lib)
-        self.assertIn("stack_status", lib)
-        self.assertIn("qwen3.5:9b", lib)
-        self.assertIn("picoclaw agent", lib)
-        self.assertIn("--no-deps", lib)
-        self.assertIn("tools/list", lib)
-        self.assertNotIn("/mnt/", lib)
-        self.assertNotIn("/home/", lib)
-        self.assertNotIn("password", lib.lower())
-        self.assertNotIn("GITEA_TOKEN", lib)
-
-    def test_start_does_not_launch_picoclaw(self) -> None:
-        start = (ROOT / "bin" / "stack" / "start").read_text()
-        self.assertIn("stack_start", start)
-        self.assertNotIn("stack_start_assistant", start)
-        self.assertNotIn("picoclaw agent", start)
-
-    def test_start_assistant_attaches_agent(self) -> None:
-        src = (ROOT / "bin" / "stack" / "start-assistant").read_text()
-        self.assertIn("stack_start_assistant", src)
-        self.assertIn("--no-attach", src)
-
-    def test_stop_does_not_down_volumes(self) -> None:
-        lib = (ROOT / "bin" / "stack" / "lib.sh").read_text()
-        self.assertIn(" compose ", lib)
-        self.assertRegex(lib, r"\bstop\b")
-        self.assertNotIn(" compose down", lib)
-        self.assertNotIn("compose down", lib)
-
-    def test_docs_name_stack_commands(self) -> None:
-        runbook = (ROOT / "docs" / "runbook.md").read_text()
-        pico = (ROOT / "docs" / "picoclaw.md").read_text()
-        agents = (ROOT / "AGENTS.md").read_text()
-        for text in (runbook, pico, agents):
-            self.assertIn("bin/stack/start", text)
-            self.assertIn("bin/stack/start-assistant", text)
-            self.assertIn("bin/stack/status", text)
-            self.assertIn("bin/stack/stop", text)
-
-
-    def test_help_prints_comments_not_source(self) -> None:
-        r = subprocess.run(
-            [str(ROOT / "bin" / "stack" / "start"), "--help"],
-            cwd=str(ROOT),
-            capture_output=True,
-            text=True,
-            check=False,
-        )
-        self.assertEqual(r.returncode, 0, r.stderr)
-        self.assertIn("bin/stack/start", r.stdout)
-        self.assertNotIn("set -euo pipefail", r.stdout)
-        self.assertNotIn("source ", r.stdout)
-
-
-class StackFakePathTest(unittest.TestCase):
-    def _fake_bin(self, tmp: Path, *, health_ok: bool) -> Path:
-        bindir = tmp / "bin"
-        bindir.mkdir()
-        curl = bindir / "curl"
-        docker = bindir / "docker"
-        log = tmp / "docker.log"
-        curl.write_text(
-            f"""#!/usr/bin/env bash
-url=""
-for a in "$@"; do
-  case "$a" in http*) url=$a ;;
-  esac
-done
-if [ "{int(health_ok)}" = "0" ] && [[ "$url" == */health ]]; then
-  echo '{{"status":"down"}}'
-  exit 7
-fi
-case "$url" in
-  */mcp)
-    echo '{{"jsonrpc":"2.0","id":1,"result":{{"tools":[{{"name":"search"}},{{"name":"get"}},{{"name":"audit"}}]}}}}'
-    ;;
-  */api/tags)
-    echo '{{"models":[{{"name":"qwen3.5:9b"}}]}}'
-    ;;
-  */api/pull)
-    echo '{{"status":"success"}}'
-    ;;
-  *)
-    echo '{{"status":"ok"}}'
-    ;;
-esac
-"""
-        )
-        docker.write_text(
-            f"""#!/usr/bin/env bash
-echo "$*" >> "{log}"
-exit 0
-"""
-        )
-        curl.chmod(curl.stat().st_mode | stat.S_IEXEC)
-        docker.chmod(docker.stat().st_mode | stat.S_IEXEC)
-        return bindir
-
-    def _env(self, bindir: Path) -> dict[str, str]:
-        env = os.environ.copy()
-        env["PATH"] = f"{bindir}:{env.get('PATH', '')}"
-        env["STACK_WAIT_SECS"] = "1"
-        env["STACK_WAIT_INTERVAL"] = "0"
-        return env
-
-    def test_start_skips_compose_when_brain_healthy(self) -> None:
-        with tempfile.TemporaryDirectory() as raw:
-            tmp = Path(raw)
-            bindir = self._fake_bin(tmp, health_ok=True)
-            log = tmp / "docker.log"
-            r = subprocess.run(
-                [str(ROOT / "bin" / "stack" / "start")],
-                cwd=str(ROOT),
-                env=self._env(bindir),
-                capture_output=True,
-                text=True,
-                check=False,
-            )
-            self.assertEqual(r.returncode, 0, r.stderr)
-            self.assertFalse(log.exists(), "healthy brain must not docker compose up")
-
-    def test_start_ups_brain_when_unhealthy(self) -> None:
-        with tempfile.TemporaryDirectory() as raw:
-            tmp = Path(raw)
-            bindir = self._fake_bin(tmp, health_ok=False)
-            log = tmp / "docker.log"
-            r = subprocess.run(
-                [str(ROOT / "bin" / "stack" / "start")],
-                cwd=str(ROOT),
-                env=self._env(bindir),
-                capture_output=True,
-                text=True,
-                check=False,
-            )
-            self.assertNotEqual(r.returncode, 0, "unhealthy brain without recovering compose must fail")
-            self.assertTrue(log.exists(), r.stderr)
-            logged = log.read_text()
-            self.assertIn("up -d", logged)
-            self.assertIn("brain", logged)
-            self.assertNotIn("picoclaw", logged)
-
-    def test_stop_stops_named_services(self) -> None:
-        with tempfile.TemporaryDirectory() as raw:
-            tmp = Path(raw)
-            bindir = self._fake_bin(tmp, health_ok=True)
-            log = tmp / "docker.log"
-            r = subprocess.run(
-                [str(ROOT / "bin" / "stack" / "stop")],
-                cwd=str(ROOT),
-                env=self._env(bindir),
-                capture_output=True,
-                text=True,
-                check=False,
-            )
-            self.assertEqual(r.returncode, 0, r.stderr)
-            logged = log.read_text()
-            self.assertIn("stop", logged)
-            self.assertNotIn(" down", logged)
-            for svc in ("brain", "brain-mcp", "reasoner", "picoclaw"):
-                self.assertIn(svc, logged)
-
-    def test_start_assistant_no_attach_starts_picoclaw(self) -> None:
-        with tempfile.TemporaryDirectory() as raw:
-            tmp = Path(raw)
-            bindir = self._fake_bin(tmp, health_ok=True)
-            log = tmp / "docker.log"
-            r = subprocess.run(
-                [str(ROOT / "bin" / "stack" / "start-assistant"), "--no-attach"],
-                cwd=str(ROOT),
-                env=self._env(bindir),
-                capture_output=True,
-                text=True,
-                check=False,
-            )
-            self.assertEqual(r.returncode, 0, r.stderr + r.stdout)
-            logged = log.read_text() if log.exists() else ""
-            self.assertIn("picoclaw", logged)
-            self.assertIn("--no-deps", logged)
-            self.assertNotIn("picoclaw agent", logged)

compose.yaml

@@ -1,6 +1,5 @@
 # 2dph — docker composition
 #
-#   bin/stack/start / start-assistant / status / stop
 #   docker compose up -d brain                  # API (Zig CGO serve)
 #   docker compose --profile index run --rm index   # Python rebuild
 #   docker compose --profile picoclaw up -d     # brain-mcp + CPU reasoner + PicoClaw gateway

docs/README.md

@@ -18,9 +18,9 @@ Evidence-first knowledge graph. Facts need proof or they are
 | tutorial / howto | [runbook](runbook.md) — run anywhere (uv, Go, Docker) |
 | explanation | [design](design.md) — two roots, deduction, D17/D20/D18 |
 | explanation | [roadmap](roadmap.md) — gap to v1 (epic #16) |
-| howto | [picoclaw](picoclaw.md) — MCP agent (`bin/stack/start-assistant`) |
+| howto | [picoclaw](picoclaw.md) — MCP agent profile |
 | howto | [reasoner](reasoner.md) — CPU bake-off (D18) |
-| reference | [PLAN.md](../PLAN.md) — decisions D1–D24 |
+| reference | [PLAN.md](../PLAN.md) — decisions D1–D22 |
 
 Decisions the public face must name: **D3** SearXNG compose, **D6** Go service /
 Python write sidecar, **D14** `bin/{subject}/{method}.go`, **D15** Gitea origin,

docs/design.md

@@ -68,15 +68,6 @@ binary); conversion prints leafs, brain write is `bin/brain/index.go`.
 `bin/facts/audit stale` flags leafs whose observed revision is behind the
 corpus HEAD.
 
-Fact **interval of truth** (D24 / OQ5): leaf props `valid_from` /
-`valid_to` (YYYY-MM-DD, inclusive; empty end = open; both empty = legacy
-always-active). `bin/brain/search.go --as-of YYYY-MM-DD` and MCP/HTTP
-`as_of` keep hits whose interval covers that day. This is not D16
-`temporal_freshness` (source freshness vs HEAD). [#36](https://git.produktor.io/eSlider/2dph/issues/36).
-Existing `kb.lbug` without the columns: open/search/add runs an idempotent
-`ALTER TABLE Leaf ADD …` (no full rebuild required). Fresh `--rebuild` still
-creates them in `CREATE NODE TABLE`.
-
 ## Sources (auto-pairing)
 
 - A: runtime state — `docker ps` (container running), ports actually bound

docs/picoclaw.md

@@ -6,18 +6,6 @@ CPU reasoner. Default agent model is `qwen3.5:9b` (RAM path, D18). Weights stay
 in the reasoner volume, not in the 2dph image.
 No secrets in git: Ollama needs no key; MCP is local HTTP.
 
-```bash
-bin/stack/start-assistant
-bin/stack/start-assistant --no-attach
-bin/stack/start-assistant -- -m "search the 2dph brain for LadybugDB"
-bin/stack/status
-bin/stack/stop
-```
-
-`start-assistant` reuses a healthy brain on `:8630`, starts the CPU reasoner,
-pulls `qwen3.5:9b` if missing, brings up the gateway with `--no-deps picoclaw`,
-then `picoclaw agent` (MCP `search` → `get` → `audit`). Gateway-only Compose:
-
 ```bash
 docker compose --profile picoclaw up -d
 # already serving :8630 / :11435:

docs/roadmap.md

@@ -41,12 +41,10 @@ Epic [#16](https://git.produktor.io/eSlider/2dph/issues/16) closed.
 [#29](https://git.produktor.io/eSlider/2dph/issues/29) OQ1 contradiction
 resolution — **in** (`temporal_freshness`, `authority_pairing`).
 [#34](https://git.produktor.io/eSlider/2dph/issues/34) D23 flaggy CLI — **in**.
-[#36](https://git.produktor.io/eSlider/2dph/issues/36) OQ5/D24 fact intervals /
-as-of — **in** (not D16 `temporal_freshness`).
 
 ## Blockers
 
-None for epic #16 (closed). Remaining v2: OQ4 (deferred).
+None for epic #16 (closed). Remaining v2: OQ4.
 
 ```
 question
@@ -62,8 +60,6 @@ question
 ## Not v1
 
 OQ4 YAML-first leafs.
-OQ5/D24 fact intervals + as-of — **in**
-([#36](https://git.produktor.io/eSlider/2dph/issues/36)).
 OCR (OQ2), duckdb-go (OQ3/D22), and D16 adjudication (OQ1) are in.
 
 ## Close epic #16 when

docs/runbook.md

@@ -53,15 +53,12 @@ bin/brain/add.go --text "arc-1 runs Matrix" --root facts --source "compose.yml x
 bin/brain/index.go --rebuild --with-facts --with-chats
 bin/brain/search.go "LadybugDB vector index"     # facts → info → web (D17)
 bin/brain/search.go "upstream flag" --no-web
-bin/brain/search.go "who works where" --as-of 2025-01-01  # D24 intervals
 source <(./bin/cli/complete.go bash)            # D23 flaggy complete
 bin/brain/get.go <id> --body
 bin/brain/stats.go
 ```
 
-`--hop N` walks File → Commit → Person from each hit. `--as-of YYYY-MM-DD`
+`--hop N` walks File → Commit → Person from each hit. Empty web results are `throttled`, not absence.
-keeps leafs whose `valid_from`/`valid_to` cover that day (empty interval =
-legacy always-on). Empty web results are `throttled`, not absence.
 Gap to v1: [roadmap](roadmap.md) / [epic #16](https://git.produktor.io/eSlider/2dph/issues/16).
 
 Ladybug 0.19: never `DROP INDEX` FTS/VECTOR (ghost catalog). Fresh indexes =
@@ -69,16 +66,6 @@ delete `var/kb.lbug` then `--rebuild`.
 
 ## HTTP / MCP
 
-```bash
-bin/stack/start                 # brain :8630, wait until MCP search/get/audit
-bin/stack/status                # YAML: brain / reasoner / picoclaw
-bin/stack/start-assistant       # + qwen3.5:9b + PicoClaw agent (ask the brain)
-bin/stack/start-assistant --no-attach
-bin/stack/stop                  # compose stop; volumes kept
-```
-
-Same Compose services by hand:
-
 ```bash
 docker compose up -d brain                       # :8630 Zig CGO serve
 docker compose --profile index run --rm index    # rebuild
@@ -86,7 +73,6 @@ docker compose --profile picoclaw up brain-mcp   # MCP 127.0.0.1:8630
 ```
 
 `GET /openapi.json`, `POST /mcp`. Agent tool order: `search` → `get` → `audit`.
-See [picoclaw.md](picoclaw.md).
 
 ## Reasoner (optional, D18)
 

internal/brain/db.go

@@ -85,18 +85,9 @@ func openWithSandbox(epsv string) error {
 		closeBrain()
 		return fmt.Errorf("LOAD EXTENSION VECTOR: %w", err)
 	}
-	migrateIntervalColumns()
 	return nil
 }
 
-// migrateIntervalColumns adds D24 valid_from/valid_to on existing Leaf tables.
-// Fresh CREATE already has them; ALTER is a no-op when the column exists.
-func migrateIntervalColumns() {
-	for _, col := range []string{"valid_from", "valid_to"} {
-		_, _ = conn.Query("ALTER TABLE Leaf ADD " + col + " STRING")
-	}
-}
-
 func closeBrain() {
 	if conn != nil {
 		conn.Close()

internal/brain/http.go

@@ -21,8 +21,8 @@ func Ready() error {
 // HTTP is the in-process API used by bin/brain/serve.go.
 type HTTP struct{}
 
-func (HTTP) Search(ctx context.Context, query string, limit int, asOf string) ([]byte, error) {
+func (HTTP) Search(ctx context.Context, query string, limit int) ([]byte, error) {
-	hits, err := searchHits(query, "", "", limit, asOf)
+	hits, err := searchHits(query, "", "", limit)
 	if err != nil {
 		return nil, err
 	}
@@ -41,7 +41,7 @@ func (HTTP) Search(ctx context.Context, query string, limit int, asOf string) ([
 	var buf bytes.Buffer
 	enc := json.NewEncoder(&buf)
 	enc.SetEscapeHTML(false)
-	if err := enc.Encode(toJSONOut(hits, query, "", asOf, webOut)); err != nil {
+	if err := enc.Encode(toJSONOut(hits, query, "", webOut)); err != nil {
 		return nil, err
 	}
 	return buf.Bytes(), nil

internal/brain/rank/args.go

@@ -5,11 +5,10 @@ import (
 	"strconv"
 
 	"github.com/eSlider/2dph/internal/cli"
-	"github.com/eSlider/2dph/internal/facts"
 	"github.com/integrii/flaggy"
 )
 
-const Usage = `usage: bin/brain/search.go "query" [--root facts|info] [--repo REPO] [-n N] [--hop N] [--as-of YYYY-MM-DD] [--json] [--no-web]
+const Usage = `usage: bin/brain/search.go "query" [--root facts|info] [--repo REPO] [-n N] [--hop N] [--json] [--no-web]
        bin/brain/search.go serve [port]
        bin/brain/search.go --list-model
        source <(./bin/cli/complete.go bash)`
@@ -20,7 +19,6 @@ type Options struct {
 	Repo      string
 	Limit     int
 	Hop       int
-	AsOf      string
 	JSONOut   bool
 	ListModel bool
 	NoWeb     bool
@@ -37,7 +35,6 @@ func NewParser(opt *Options) *flaggy.Parser {
 	p.String(&opt.Repo, "", "repo", "filter by repo")
 	p.Int(&opt.Limit, "n", "n", "max hits")
 	p.Int(&opt.Hop, "", "hop", "walk FROM_FILE depth 1-3")
-	p.String(&opt.AsOf, "", "as-of", "keep facts active on YYYY-MM-DD (D24)")
 	p.Bool(&opt.JSONOut, "", "json", "JSON output")
 	p.Bool(&opt.NoWeb, "", "no-web", "stay local")
 	p.Bool(&opt.ListModel, "", "list-model", "print embedding model")
@@ -67,13 +64,6 @@ func ParseArgs(args []string) (Options, error) {
 	if opt.Hop > 3 {
 		return opt, fmt.Errorf("--hop max is 3 (File → Commit → Person)")
 	}
-	if opt.AsOf != "" {
-		day := facts.NormalizeDay(opt.AsOf)
-		if len(day) != 10 || day[4] != '-' || day[7] != '-' {
-			return opt, fmt.Errorf("--as-of must be YYYY-MM-DD, got %q", opt.AsOf)
-		}
-		opt.AsOf = day
-	}
 	if opt.Query == "" && !opt.ListModel {
 		return opt, fmt.Errorf("no query given")
 	}

internal/brain/rank/asof_test.go

@@ -1,34 +0,0 @@
-package rank
-
-import "testing"
-
-func TestFilterAsOfKeepsXDropsY(t *testing.T) {
-	hits := []Hit{
-		{ID: "x", Text: "Andrey works at X", ValidFrom: "2024-03-01", ValidTo: "2025-07-15"},
-		{ID: "y", Text: "Andrey works at Y", ValidFrom: "2025-07-16", ValidTo: ""},
-		{ID: "legacy", Text: "always true claim", ValidFrom: "", ValidTo: ""},
-	}
-	out := FilterAsOf(hits, "2025-01-01")
-	if len(out) != 2 {
-		t.Fatalf("len=%d want 2: %+v", len(out), out)
-	}
-	if out[0].ID != "x" || out[1].ID != "legacy" {
-		t.Fatalf("got %+v", out)
-	}
-	if FilterAsOf(hits, "") == nil || len(FilterAsOf(hits, "")) != 3 {
-		t.Fatal("empty as-of must keep all")
-	}
-}
-
-func TestParseArgsAsOf(t *testing.T) {
-	opt, err := ParseArgs([]string{"who works where", "--as-of", "2025-01-01", "--json"})
-	if err != nil {
-		t.Fatal(err)
-	}
-	if opt.AsOf != "2025-01-01" {
-		t.Fatalf("AsOf=%q", opt.AsOf)
-	}
-	if _, err := ParseArgs([]string{"q", "--as-of", "not-a-date"}); err == nil {
-		t.Fatal("expected bad as-of error")
-	}
-}

internal/brain/rank/query.go

@@ -3,12 +3,10 @@ package rank
 // BM25 ranks best-first, so the top hits are the *highest* scores; cosine
 // distance ranks best-first ascending. Both mirror kblib.py.
 const FTSStmt = "CALL QUERY_FTS_INDEX('Leaf', 'id', $q) " +
-	"RETURN node.id, node.text, node.root, node.source, score, node.confidence, " +
+	"RETURN node.id, node.text, node.root, node.source, score, node.confidence ORDER BY score DESC LIMIT $n"
-	"node.valid_from, node.valid_to ORDER BY score DESC LIMIT $n"
 
 const VecStmt = "CALL QUERY_VECTOR_INDEX('Leaf', 'Leaf_vec', $q, $n) " +
-	"RETURN node.id, node.text, node.root, node.source, distance, node.confidence, " +
+	"RETURN node.id, node.text, node.root, node.source, distance, node.confidence ORDER BY distance LIMIT $n"
-	"node.valid_from, node.valid_to ORDER BY distance LIMIT $n"
 
 // HopStmt is the Cypher walk from a search hit. Depth 1 = File, 2 = Commit, 3 = Person.
 func HopStmt(depth int) string {

internal/brain/rank/rank.go

@@ -5,8 +5,6 @@ package rank
 import (
 	"sort"
 	"strings"
-
-	"github.com/eSlider/2dph/internal/facts"
 )
 
 type HopNode struct {
@@ -25,24 +23,17 @@ type Hit struct {
 	Source     string    `json:"-"`
 	Score      float64   `json:"score"`
 	Snippet    string    `json:"snippet,omitempty"`
-	ValidFrom  string    `json:"valid_from,omitempty"`
-	ValidTo    string    `json:"valid_to,omitempty"`
 	Hops       []HopNode `json:"hops,omitempty"`
 }
 
 // rrfK dampens the contribution of low ranks; same constant as kblib.py.
 const rrfK = 60
 
-// RankAndFilter fuses the two hit lists, applies --root/--repo/--as-of, then
+// RankAndFilter fuses the two hit lists, applies --root/--repo, then cuts to
-// cuts to limit. Cutting first dropped every matching leaf ranked below the
+// limit. Cutting first dropped every matching leaf ranked below the cut, so
-// cut, so `--root facts` came back empty whenever info leafs filled the top N.
+// `--root facts` came back empty whenever info leafs filled the top N.
-// limit <= 0 keeps everything. asOf empty skips interval filter (D24).
+// limit <= 0 keeps everything.
 func RankAndFilter(fts, vec []Hit, root, repo string, limit int) []Hit {
-	return RankAndFilterAsOf(fts, vec, root, repo, "", limit)
-}
-
-// RankAndFilterAsOf is RankAndFilter with D24 fact-interval filter.
-func RankAndFilterAsOf(fts, vec []Hit, root, repo, asOf string, limit int) []Hit {
 	out := Hybrid(fts, vec, 0)
 	if root != "" {
 		out = FilterRoot(out, root)
@@ -50,30 +41,12 @@ func RankAndFilterAsOf(fts, vec []Hit, root, repo, asOf string, limit int) []Hit
 	if repo != "" {
 		out = FilterRepo(out, repo)
 	}
-	if asOf != "" {
-		out = FilterAsOf(out, asOf)
-	}
 	if limit > 0 && len(out) > limit {
 		out = out[:limit]
 	}
 	return out
 }
 
-// FilterAsOf keeps hits whose [valid_from, valid_to] covers asOf (D24).
-// Empty intervals stay (legacy leafs). Empty asOf keeps all.
-func FilterAsOf(hits []Hit, asOf string) []Hit {
-	if asOf == "" {
-		return hits
-	}
-	var out []Hit
-	for _, h := range hits {
-		if facts.ActiveAt(h.ValidFrom, h.ValidTo, asOf) {
-			out = append(out, h)
-		}
-	}
-	return out
-}
-
 // Hybrid merges FTS and vector hits by reciprocal rank fusion.
 // limit <= 0 returns the full fused list.
 func Hybrid(fts, vec []Hit, limit int) []Hit {

internal/brain/search.go

@@ -55,7 +55,7 @@ func runSearch(args []string) int {
 	}
 	defer closeBrain()
 
-	hits, err := searchHits(query, root, repo, limit, opt.AsOf)
+	hits, err := searchHits(query, root, repo, limit)
 	if err != nil {
 		fmt.Fprintf(os.Stderr, "search: %v\n", err)
 		return 1
@@ -85,7 +85,6 @@ func runSearch(args []string) int {
 	out := Dict{
 		{"query", query},
 		{"root_filter", root},
-		{"as_of", opt.AsOf},
 		{"count", len(results)},
 		{"results", resultsToDicts(results)},
 	}
@@ -97,13 +96,13 @@ func runSearch(args []string) int {
 		enc := json.NewEncoder(os.Stdout)
 		enc.SetIndent("", "  ")
 		enc.SetEscapeHTML(false)
-		return b2i(enc.Encode(toJSONOut(results, query, root, opt.AsOf, webOut)))
+		return b2i(enc.Encode(toJSONOut(results, query, root, webOut)))
 	}
 	fmt.Print(toYAML(out, 0))
 	return 0
 }
 
-func searchHits(query, root, repo string, limit int, asOf string) ([]Hit, error) {
+func searchHits(query, root, repo string, limit int) ([]Hit, error) {
 	emb, err := embedQuery(query)
 	if err != nil {
 		return nil, fmt.Errorf("embed: %w", err)
@@ -116,7 +115,7 @@ func searchHits(query, root, repo string, limit int, asOf string) ([]Hit, error)
 	if vec, err = queryVector(emb, limit*3); err != nil {
 		fmt.Fprintf(os.Stderr, "vec: %v\n", err)
 	}
-	return rank.RankAndFilterAsOf(fts, vec, root, repo, asOf, limit), nil
+	return rank.RankAndFilter(fts, vec, root, repo, limit), nil
 }
 
 func attachHops(hits []Hit, n int) error {
@@ -221,35 +220,15 @@ func rowsToHits(res *lbug.QueryResult) ([]Hit, error) {
 		if len(vals) >= 6 {
 			conf = fmt.Sprint(vals[5])
 		}
-		vf, vt := "", ""
+		hits = append(hits, Hit{ID: id, Text: text, Root: root, Source: source, Score: score, Confidence: conf})
-		if len(vals) >= 8 {
-			vf = nullStr(vals[6])
-			vt = nullStr(vals[7])
-		}
-		hits = append(hits, Hit{
-			ID: id, Text: text, Root: root, Source: source, Score: score,
-			Confidence: conf, ValidFrom: vf, ValidTo: vt,
-		})
 	}
 	return hits, nil
 }
 
-func nullStr(v any) string {
-	if v == nil {
-		return ""
-	}
-	s := fmt.Sprint(v)
-	if s == "<nil>" {
-		return ""
-	}
-	return s
-}
-
 // JSON output types
 type jsonOut struct {
 	Query      string             `json:"query"`
 	RootFilter string             `json:"root_filter"`
-	AsOf       string             `json:"as_of,omitempty"`
 	Count      int                `json:"count"`
 	Results    []jsonHit          `json:"results"`
 	Web        *rank.SecondSource `json:"web,omitempty"`
@@ -262,12 +241,10 @@ type jsonHit struct {
 	Confidence string         `json:"confidence,omitempty"`
 	Score      float64        `json:"score"`
 	Snippet    string         `json:"snippet,omitempty"`
-	ValidFrom  string         `json:"valid_from,omitempty"`
-	ValidTo    string         `json:"valid_to,omitempty"`
 	Hops       []rank.HopNode `json:"hops,omitempty"`
 }
 
-func toJSONOut(hits []Hit, query, rootFilter, asOf string, web *rank.SecondSource) *jsonOut {
+func toJSONOut(hits []Hit, query, rootFilter string, web *rank.SecondSource) *jsonOut {
 	out := make([]jsonHit, len(hits))
 	for i, h := range hits {
 		out[i] = jsonHit{
@@ -277,15 +254,12 @@ func toJSONOut(hits []Hit, query, rootFilter, asOf string, web *rank.SecondSourc
 			Confidence: h.Confidence,
 			Score:      h.Score,
 			Snippet:    h.Snippet,
-			ValidFrom:  h.ValidFrom,
-			ValidTo:    h.ValidTo,
 			Hops:       h.Hops,
 		}
 	}
 	return &jsonOut{
 		Query:      query,
 		RootFilter: rootFilter,
-		AsOf:       asOf,
 		Count:      len(hits),
 		Results:    out,
 		Web:        web,
@@ -304,12 +278,6 @@ func resultsToDicts(hits []Hit) []any {
 		if h.Confidence != "" {
 			d = append(d, KV{"confidence", h.Confidence})
 		}
-		if h.ValidFrom != "" {
-			d = append(d, KV{"valid_from", h.ValidFrom})
-		}
-		if h.ValidTo != "" {
-			d = append(d, KV{"valid_to", h.ValidTo})
-		}
 		if h.Snippet != "" {
 			d = append(d, KV{"snippet", h.Snippet})
 		}

internal/facts/interval.go

@@ -1,44 +0,0 @@
-package facts
-
-// Interval of truth for a fact leaf (D24 / OQ5). Not D16 source staleness.
-//
-// Empty valid_from and valid_to means "always" (legacy leafs). Empty asOf
-// means "do not filter". Dates compare as YYYY-MM-DD (lexicographic).
-
-// NormalizeDay keeps the calendar day from ISO-8601 or bare dates.
-func NormalizeDay(s string) string {
-	s = trimSpace(s)
-	if len(s) >= 10 && s[4] == '-' && s[7] == '-' {
-		return s[:10]
-	}
-	return s
-}
-
-func trimSpace(s string) string {
-	i, j := 0, len(s)
-	for i < j && (s[i] == ' ' || s[i] == '\t' || s[i] == '\n' || s[i] == '\r') {
-		i++
-	}
-	for j > i && (s[j-1] == ' ' || s[j-1] == '\t' || s[j-1] == '\n' || s[j-1] == '\r') {
-		j--
-	}
-	return s[i:j]
-}
-
-// ActiveAt reports whether a fact with [validFrom, validTo] holds at asOf.
-// validTo empty = open-ended. Both ends inclusive.
-func ActiveAt(validFrom, validTo, asOf string) bool {
-	asOf = NormalizeDay(asOf)
-	if asOf == "" {
-		return true
-	}
-	from := NormalizeDay(validFrom)
-	to := NormalizeDay(validTo)
-	if from != "" && asOf < from {
-		return false
-	}
-	if to != "" && asOf > to {
-		return false
-	}
-	return true
-}

internal/facts/interval_test.go

@@ -1,73 +0,0 @@
-package facts
-
-import "testing"
-
-func TestActiveAtOpenEnded(t *testing.T) {
-	// works at Y from 2025-07-16, no end
-	if !ActiveAt("2025-07-16", "", "2025-07-16") {
-		t.Fatal("inclusive valid_from")
-	}
-	if !ActiveAt("2025-07-16", "", "2026-01-01") {
-		t.Fatal("open-ended valid_to")
-	}
-	if ActiveAt("2025-07-16", "", "2025-07-15") {
-		t.Fatal("before valid_from must be inactive")
-	}
-}
-
-func TestActiveAtClosedInterval(t *testing.T) {
-	// works at X 2024-03-01 .. 2025-07-15
-	if !ActiveAt("2024-03-01", "2025-07-15", "2025-01-01") {
-		t.Fatal("mid interval")
-	}
-	if !ActiveAt("2024-03-01", "2025-07-15", "2024-03-01") {
-		t.Fatal("inclusive start")
-	}
-	if !ActiveAt("2024-03-01", "2025-07-15", "2025-07-15") {
-		t.Fatal("inclusive end")
-	}
-	if ActiveAt("2024-03-01", "2025-07-15", "2025-07-16") {
-		t.Fatal("day after end")
-	}
-	if ActiveAt("2024-03-01", "2025-07-15", "2024-02-28") {
-		t.Fatal("day before start")
-	}
-}
-
-func TestActiveAtEmptyIntervalAlwaysTrue(t *testing.T) {
-	// legacy leafs without intervals stay visible for any as-of
-	if !ActiveAt("", "", "2025-01-01") {
-		t.Fatal("empty interval must remain active")
-	}
-	if !ActiveAt("", "", "") {
-		t.Fatal("no as-of means all active")
-	}
-}
-
-func TestActiveAtEmptyAsOfKeepsAll(t *testing.T) {
-	if !ActiveAt("2099-01-01", "2099-12-31", "") {
-		t.Fatal("empty as-of must not filter")
-	}
-}
-
-func TestAsOfPickXNotY(t *testing.T) {
-	// Acceptance from #36: as of 2025-01-01 → X, not Y
-	xFrom, xTo := "2024-03-01", "2025-07-15"
-	yFrom, yTo := "2025-07-16", ""
-	asOf := "2025-01-01"
-	if !ActiveAt(xFrom, xTo, asOf) {
-		t.Fatal("X must be active as of 2025-01-01")
-	}
-	if ActiveAt(yFrom, yTo, asOf) {
-		t.Fatal("Y must be inactive as of 2025-01-01")
-	}
-}
-
-func TestNormalizeDayTrimsTime(t *testing.T) {
-	if NormalizeDay("2025-01-01T12:00:00Z") != "2025-01-01" {
-		t.Fatalf("got %q", NormalizeDay("2025-01-01T12:00:00Z"))
-	}
-	if NormalizeDay("2025-01-01") != "2025-01-01" {
-		t.Fatalf("got %q", NormalizeDay("2025-01-01"))
-	}
-}

internal/httpapi/mcp.go

@@ -105,18 +105,11 @@ func (s *Server) mcpCall(r *http.Request, params json.RawMessage) (any, error) {
 		if limit < 1 || limit > 100 {
 			return mcpText(`{"error":"n must be int 1..100"}`, true), nil
 		}
-		asOf := ""
-		if raw, ok := p.Arguments["as_of"]; ok {
-			asOf = strings.TrimSpace(fmt.Sprint(raw))
-			if asOf == "<nil>" {
-				asOf = ""
-			}
-		}
 		if !s.tryAcquire(r) {
 			return nil, fmt.Errorf("cancelled")
 		}
 		defer s.release()
-		body, err = s.api.Search(r.Context(), q, limit, asOf)
+		body, err = s.api.Search(r.Context(), q, limit)
 	case "get":
 		id := strings.TrimSpace(fmt.Sprint(p.Arguments["id"]))
 		if id == "" || id == "<nil>" {

internal/httpapi/server.go

@@ -24,7 +24,7 @@ import (
 
 // API is the in-process brain surface. Production serve.go wires internal/brain.
 type API interface {
-	Search(ctx context.Context, query string, limit int, asOf string) ([]byte, error)
+	Search(ctx context.Context, query string, limit int) ([]byte, error)
 	Get(ctx context.Context, id string, body bool) ([]byte, error)
 	Stats(ctx context.Context) ([]byte, error)
 	Audit(ctx context.Context) ([]byte, error)
@@ -85,12 +85,11 @@ func (s *Server) handleSearch(w http.ResponseWriter, r *http.Request) {
 		}
 		limit = n
 	}
-	asOf := strings.TrimSpace(r.URL.Query().Get("as_of"))
 	if !s.acquire(w, r) {
 		return
 	}
 	defer s.release()
-	body, err := s.api.Search(r.Context(), q, limit, asOf)
+	body, err := s.api.Search(r.Context(), q, limit)
 	writeAPI(w, body, err)
 }
 
@@ -188,18 +187,13 @@ type ExecSearcher struct {
 	Timeout time.Duration
 }
 
-func (b ExecSearcher) Search(ctx context.Context, query string, limit int, asOf string) ([]byte, error) {
+func (b ExecSearcher) Search(ctx context.Context, query string, limit int) ([]byte, error) {
 	if b.Timeout == 0 {
 		b.Timeout = 60 * time.Second
 	}
 	ctx, cancel := context.WithTimeout(ctx, b.Timeout)
 	defer cancel()
-	args := []string{"--json", "-n", strconv.Itoa(limit)}
+	cmd := exec.CommandContext(ctx, b.CmdPath, "--json", "-n", strconv.Itoa(limit), query)
-	if asOf != "" {
-		args = append(args, "--as-of", asOf)
-	}
-	args = append(args, query)
-	cmd := exec.CommandContext(ctx, b.CmdPath, args...)
 	out, err := cmd.Output()
 	if err != nil {
 		var exitErr *exec.ExitError

internal/httpapi/server_test.go

@@ -21,10 +21,10 @@ type fakeSearcher struct {
 	calls    int
 	active   atomic.Int32
 	maxSeen  atomic.Int32
-	callback func(q string, limit int, asOf string) ([]byte, error)
+	callback func(q string, limit int) ([]byte, error)
 }
 
-func (f *fakeSearcher) Search(ctx context.Context, query string, limit int, asOf string) ([]byte, error) {
+func (f *fakeSearcher) Search(ctx context.Context, query string, limit int) ([]byte, error) {
 	f.mu.Lock()
 	f.calls++
 	f.mu.Unlock()
@@ -44,7 +44,7 @@ func (f *fakeSearcher) Search(ctx context.Context, query string, limit int, asOf
 		}
 	}
 	if f.callback != nil {
-		return f.callback(query, limit, asOf)
+		return f.callback(query, limit)
 	}
 	return []byte(`{"query":"` + query + `","count":0,"results":[]}`), nil
 }
@@ -109,7 +109,7 @@ func TestSearchMissingQuery(t *testing.T) {
 }
 
 func TestSearchReturnsSearcherResult(t *testing.T) {
-	fs := &fakeSearcher{callback: func(q string, limit int, asOf string) ([]byte, error) {
+	fs := &fakeSearcher{callback: func(q string, limit int) ([]byte, error) {
 		return []byte(`{"query":"` + q + `","count":1,"results":[{"id":"x"}]}`), nil
 	}}
 	h := NewServer(fs, 1)
@@ -168,7 +168,7 @@ func TestSearchRejectsBadLimit(t *testing.T) {
 }
 
 func TestGetLeaf(t *testing.T) {
-	fs := &fakeSearcher{callback: func(q string, limit int, asOf string) ([]byte, error) {
+	fs := &fakeSearcher{callback: func(q string, limit int) ([]byte, error) {
 		return []byte(`{}`), nil
 	}}
 	h := NewServer(fs, 1)

internal/httpapi/spec.go

@@ -35,7 +35,6 @@ var Ops = []Op{
 		Params: []Param{
 			{Name: "q", In: "query", Type: "string", Description: "search query", Required: true},
 			{Name: "n", In: "query", Type: "integer", Description: "hit limit 1..100 (default 10)"},
-			{Name: "as_of", In: "query", Type: "string", Description: "YYYY-MM-DD; keep facts active on that day (D24)"},
 		},
 	},
 	{
@@ -55,8 +54,6 @@ var Ops = []Op{
 			{Name: "text", In: "query", Type: "string", Description: "leaf text (omit for CLI hint)"},
 			{Name: "root", In: "query", Type: "string", Description: "facts or info (default info)"},
 			{Name: "source", In: "query", Type: "string", Description: "evidence pointer; facts need two sources"},
-			{Name: "valid_from", In: "query", Type: "string", Description: "fact interval start YYYY-MM-DD (D24)"},
-			{Name: "valid_to", In: "query", Type: "string", Description: "fact interval end YYYY-MM-DD inclusive (D24)"},
 		},
 	},
 	{Path: PathOpenAPI, Method: "get", ID: "openapi", Summary: "OpenAPI 3 document for this server"},

skills/brain/SKILL.md

@@ -26,7 +26,6 @@ second independent source when local roots cannot confirm. An answer is
 bin/brain/search.go "Matrix federation"                # pointers + snippets, YAML
 bin/brain/search.go "onlyoffice postgres" --root facts # restrict to confirmed
 bin/brain/search.go "where is cs-lexicon" --json | yq '.[].ref'
-bin/brain/search.go "who works where" --as-of 2025-01-01  # D24 intervals
 bin/brain/add.go --text T --root facts --source "a.md x b.md"
 bin/brain/get.go <id> --body                           # full chunk only when needed
 bin/brain/stats.go                                     # index health
@@ -35,8 +34,6 @@ bin/brain/eval.go                                      # recall@5 >= 0.95 gate (
 
 `bin/kb/search` is a deprecated wrapper. `--hop N` walks
 `FROM_FILE` / `HAS_VERSION` / `AUTHORED` from each hit (1=File, 3=Person).
-`--as-of YYYY-MM-DD` keeps leafs whose `valid_from`/`valid_to` cover that day
-(empty interval = always; not D16 source staleness).
 
 ## Rules
 

skills/picoclaw/SKILL.md

@@ -12,12 +12,6 @@ PicoClaw speaks MCP at `POST /mcp` on `bin/brain/serve.go`. Compose profile
 `picoclaw` runs the official `sipeed/picoclaw` gateway plus `brain-mcp`
 (see [docs/picoclaw.md](../../docs/picoclaw.md)).
 
-```bash
-bin/stack/start-assistant     # brain + qwen3.5:9b + gateway + picoclaw agent
-bin/stack/status
-bin/stack/stop
-```
-
 ## Tool order (before a factual reply)
 
 1. **`search`** — facts root first, then info. The `web` block is a second