docs(6205): lesson_rules comments state the reason, not the instance that taught it

Issue, milestone, snippet and rule-number citations are removed; the scope
docstring states the leak it prevents without naming the milestone that
closed it for the direct arms.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/scribe/services/lesson_rules.py

@@ -1,4 +1,4 @@
-"""Lessons point at rules (milestone 440, #4196).
+"""Lessons point at rules.
 
 A lesson is a non-binding record of one situation; a rule is the binding
 choice for a class of them. This service owns the link between the two — which
@@ -7,17 +7,18 @@ rule a lesson is an instance of — and both directions of reading it.
 THE STATES (models/lesson_rule_link.py says why each exists):
 `suggested` while evidence accumulates, `confirmed` or `rejected` once a
 judgment is made. Every write here is a JUDGMENT, so every write lands as
-confirmed or rejected; `suggested` rows come from the co-surfacing recorder
-(#4637), never from a caller naming a rule.
+confirmed or rejected; `suggested` rows come from the co-surfacing recorder,
+never from a caller naming a rule.
 
-THE THIRD ANSWER (#4631). "Which rule is this an instance of?" has three
+THE THIRD ANSWER. "Which rule is this an instance of?" has three
 answers, and only two of them are links: a rule named (confirmed), or NO RULE
 FITS — a `lesson_no_rule` row carrying the reason. A lesson with neither is
 UNJUDGED, and `list_unjudged` lists those. The three are kept apart because a
 lesson that stands alone is the raw material for a rule nobody has written yet
-(#4634), and that is unreadable if "nobody looked" means the same thing.
+(see Convergence below), and that is unreadable if "nobody looked" means the
+same thing.
 
-THE SOFT LINK (#4637). When one hook request puts a lesson and a rule in
+THE SOFT LINK. When one hook request puts a lesson and a rule in
 front of the reader together, `co_surfaced` records the pair as evidence on a
 SUGGESTED link, and once that evidence crosses a bar the next co-arrival asks
 the reader to judge it. The evidence counts distinct SITUATIONS, not
@@ -25,7 +26,7 @@ arrivals: two records that resemble each other arrive together on every
 similar prompt, and counting each time would measure their similarity over
 and over rather than any relation between them.
 
-ACL (rule 78). Linking changes what a lesson says about itself, so it needs
+ACL (services/access.py). Linking changes what a lesson says about itself, so it needs
 WRITE on the lesson (`access.can_write_note`, share-aware). It names a rule, so
 it needs the rule to be one the caller may read — rules are owner-scoped, and
 `rulebooks._fetch_owned_rule` / `_owned_rules_clause` are that check's two
@@ -67,8 +68,8 @@ _NO_RULE_NOTE = "no rule fits: "
 # What `rule_judgment` reads on a lesson payload — the three answers.
 LINKED, NO_RULE, UNJUDGED = "linked", "no_rule", "unjudged"
 
-# THE SOFT-LINK EVIDENCE BAR (#4637) — defaults, stated as defaults (rules 32,
-# 115): nothing about this install chose them.
+# THE SOFT-LINK EVIDENCE BAR — defaults, stated as defaults: nothing about an
+# install chose them.
 #
 # Three distinct situations before a pair is put to the reader. One is
 # coincidence and two is a pattern only by courtesy; three different prompts
@@ -361,7 +362,7 @@ async def attach_lesson_rules(user_id: int, rows: list[dict], *, key: str = "id"
     """Add `rules` and `rule_judgment` (plus `no_rule` when that is the answer)
     to each lesson payload row, in place — a fixed number of queries per page.
 
-    Fail-open (snippet #4286): this decorates a lesson the caller already has,
+    Fail-open: this decorates a lesson the caller already has,
     so a failed lookup leaves the keys off and logs, rather than refusing the
     lesson. An absent key reads as "not attached", never as "no rule".
     """
@@ -470,7 +471,7 @@ async def rule_candidates(
 async def attach_rule_lessons(user_id: int, data: dict, rule_id: int) -> None:
     """Add `lessons` to a rule payload, in place, when there are any.
 
-    Present-only, as a rule's `systems` and `relations` are (#2483), and
+    Present-only, as a rule's `systems` and `relations` are, and
     fail-open for the reason `attach_lesson_rules` gives.
     """
     try:
@@ -487,8 +488,8 @@ def situation_key(arm: str, text: str) -> str:
     """A fingerprint of one situation, so a repeat counts once.
 
     `arm` is part of the key — "p" for a prompt, "w" for a file being written,
-    "s" for a session (the rule↔moment signal, milestone 458 step 7), "d"
-    for a day (the misfire signal, step 7b, whose door carries no session) —
+    "s" for a session (the rule↔moment signal), "d" for a day (the misfire
+    signal, whose door carries no session) —
     because each names a different kind of situation and must not collide.
     On the prompt arm the text is the prompt: lowercased, split into word
     tokens of _MIN_TOKEN or more, de-duplicated and sorted, so the same ask
@@ -657,7 +658,7 @@ async def _co_surfaced(user_id, lesson_ids, rule_ids, arm, situation, project_id
     return _proposal_line(lid, lesson_title, rid, rule.title, rule.kind or "rule", ev)
 
 
-# ── Reaching a rule through its lessons (#4633) ──────────────────────────────
+# ── Reaching a rule through its lessons ──────────────────────────────────────
 
 
 async def confirmed_lessons(user_id: int) -> set[int]:
@@ -666,8 +667,8 @@ async def confirmed_lessons(user_id: int) -> set[int]:
 
     CONFIRMED ONLY, and the reason is the soft link's: a suggested link that
     carried its rule would put the two side by side on every prompt that
-    found the lesson, which is exactly the co-arrival #4637 counts as
-    evidence — the suggestion would manufacture its own proof.
+    found the lesson, which is exactly the co-arrival the soft link counts
+    as evidence — the suggestion would manufacture its own proof.
 
     Asked first and cheaply, so an arm on an install with no confirmed links
     — every install, until someone judges one — never pays for a search.
@@ -695,11 +696,11 @@ async def confirmed_rules_in_scope(
 ) -> dict[int, list]:
     """{lesson_id: [Rule]} — each lesson's CONFIRMED rules that may surface here.
 
-    "May surface here" is the rule arms' own scope (milestone 414): a global
-    rule, or a rule of THIS project. A lesson is project-independent and
-    surfaces everywhere, so without this a lesson linked to project A's rule
-    would carry that rule into project B's sessions — the leak milestone 414
-    closed for the direct arms, reopened through a side door.
+    "May surface here" is the rule arms' own scope: a global rule, or a rule
+    of THIS project. A lesson is project-independent and surfaces everywhere,
+    so without this a lesson linked to project A's rule would carry that rule
+    into project B's sessions — a leak the direct arms' scope prevents,
+    reopened through a side door.
     """
     from scribe.services.rulebooks import _owned_rules_clause
 
@@ -727,16 +728,16 @@ async def confirmed_rules_in_scope(
     return out
 
 
-# ── Convergence: lessons with no rule that keep landing in one place (#4634) ─
+# ── Convergence: lessons with no rule that keep landing in one place ────────
 #
 # A lesson answered "no rule fits" is a situation nothing binds. One is a
 # lesson. Several that resemble each other are what a missing rule looks like
 # from the outside — the same moment met again and again, each time written
 # down as advice. This is noticed at the WRITE, when the newest of them is
-# answered, and never by a sweep or a timer (#4183): the reader is in the
+# answered, and never by a sweep or a timer: the reader is in the
 # situation then, and a nudge arriving anywhere else is one nobody acts on.
 #
-# WHAT "RESEMBLE" MEANS (#5193). Not a fixed similarity. Lessons are written
+# WHAT "RESEMBLE" MEANS. Not a fixed similarity. Lessons are written
 # in one register — a sentence of advice and the moment it applies — so an
 # embedder scores any two of them well above two unrelated texts, and a
 # constant bar sits inside that band: every no-rule lesson then "resembles"
@@ -750,10 +751,10 @@ async def confirmed_rules_in_scope(
 #
 # And resemblance must be MUTUAL, among every member, not just to the lesson
 # being answered. A lesson broad enough to stand near many others is a hub,
-# and hub-and-spoke is how three unrelated lessons used to make a "group"
-# through one general one. A clique is the shape of one situation met again.
+# and hub-and-spoke lets three unrelated lessons make a "group" through one
+# general one. A clique is the shape of one situation met again.
 #
-# DEFAULTS, stated as defaults (rules 32, 115). Three lessons — the new one
+# DEFAULTS, stated as defaults. Three lessons — the new one
 # and two it resembles — is the smallest group that is a pattern rather than
 # a pair. One spread above the background is a modest bar for one direction
 # alone; the strictness comes from requiring it of every pair in both
@@ -834,7 +835,7 @@ async def convergence_for(user_id: int, lesson_id: int) -> dict | None:
     """The convergence a newly answered no-rule lesson completes, or None.
 
     Fail-open: this decorates a write that already succeeded, so a failed
-    search leaves the response as it was (snippet #4286's reasoning).
+    search leaves the response as it was.
     """
     try:
         return await _convergence_for(user_id, lesson_id)