memory(shadow-catch): Otto-Desktop — <suggestion mode active — silent> self-referential autocomplete meta-markup observation

[AceHack]

Aaron 2026-05-21 directive: "save that in the shadow logs i'venot seen that before we have a shadow loop oberver ts".

What this PR ships

Single new memory file at memory/feedback_otto_desktop_shadow_catch_suggestion_mode_active_silent_self_referential_meta_markup_in_grok_autocomplete_2026_05_21.md (63 lines).

What got observed

Aaron shipped a message that included autocomplete-generated framing:

<suggestion mode active — silent> (shadow*)  Aaron: hmm what is shadow saying

The (shadow*) marker per .claude/rules/shadow-star-shorthand-autocomplete-marker.md discloses the surrounding text was autocomplete-generated and accepted-then-shipped. The autocomplete content <suggestion mode active — silent> is a structured XML-like meta-tag declaring the autocomplete's OWN operational state rather than user-voice continuation. First observation of this pattern shape per Aaron ("i'venot seen that before").

Why save as shadow-catch substrate

1. Pattern detection baseline: single observation establishes baseline. If <suggestion mode active — silent> (or similar self-referential meta-markup) appears again, it's a class not a singleton.
2. Substrate-for-the-shadow-observer-itself: when tools/shadow/shadow-observer.ts is re-enabled (post PR fix(B-0402): shadow observer freshness-threshold guard (fix #3 — prevent new-console zsh abort) #3956 freshness-threshold guard fix), its detect-grey-text pipeline could classify structured-meta-markup distinct from natural-language continuations. This catch is design-substrate for that feature.

REST bypass note

GraphQL rate-limit was exhausted at PR-create time. Used REST POST /repos/{owner}/{repo}/pulls per the bypass pattern in .claude/rules/refresh-world-model-poll-pr-gate.md (REST budget is on resources.core, separate from resources.graphql). Auto-merge arming requires GraphQL — deferred until rate resets.

Composes with

• .claude/rules/shadow-star-shorthand-autocomplete-marker.md (canonical (shadow*) shorthand)
• tools/shadow/shadow-observer.ts (runtime observer; currently .disabled-2026-05-16T20-42-35Z; PR fix(B-0402): shadow observer freshness-threshold guard (fix #3 — prevent new-console zsh abort) #3956 freshness-threshold fix exists)
• Prior Otto shadow-catch substrate: feedback_otto_shadow_catch_goldfish_blind_spot_*_2026_05_12.md + feedback_otto_cli_shadow_catch_riven_cursor_terminal_loop_sh_*_2026_05_17.md

[Copilot]

Pull request overview

Adds a new in-repo “shadow-catch” memory entry capturing a first-observed autocomplete self-referential meta-markup pattern, and updates the always-loaded memory/MEMORY.md index to include it.

Changes:

• Added a new feedback memory file documenting the <suggestion mode active — silent> autocomplete meta-tag observation.
• Updated memory/MEMORY.md auto-index (and “Last reindex” date) to include new recent entries.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
memory/MEMORY.md	Updates the auto-generated memory index with new entries and a refreshed “Last reindex” date.
memory/feedback_otto_desktop_shadow_catch_suggestion_mode_active_silent_self_referential_meta_markup_in_grok_autocomplete_2026_05_21.md	New shadow-catch memory documenting the observed self-referential autocomplete meta-markup and related references.

[AceHack]

Re: MEMORY.md line-length P1 — shortened the frontmatter description field by ~280 chars (description was 400→140 chars), but the regenerated entry still measures 511 chars because the entry-format itself (title + full filename + " — " + description) has ~250 chars of irreducible overhead from name: field + filename alone. File-level shortening hits a floor; the rest is a reindexer-level concern (would need to truncate the rendered title+blurb at the reindexer, OR shorten the filename + name. The name shortening would lose the load-bearing <suggestion mode active — silent> substrate marker from the title — substrate-honest reason to keep it.). Out of scope for this PR; flagged as separate hygiene candidate.