docs: prune landed todos + refresh scratchpad + as-built terminal-rendering

todo: drop landed entries (terminal coherence pass, get_state_file
defense-in-depth, self-management of loose ends, persist+cold-load
ctx-badge).

claude.md:
- scratchpad: new just-landed entries for ctx+cost badge split,
  terminal coherence pass, loose_ends rename + cancel_loose_end,
  whoami, reminder failure persistence, path linkify, tombstones+
  meta_inputs events, agent open-threads section + container pending-
  reminder chip + task event rendering. drops the meta-flake
  "just landed" — structural facts live in the file map +
  approvals.md, the narrative was no longer load-bearing.
- file map: hive-fr0nt now lists MARKED_JS + marked.min.js + the
  unified prefix-column terminal.css update.
- reading paths: terminal-rendering.md description matches as-built.

docs/terminal-rendering.md: rewritten as as-built reference. layout
contract documents the padding-left + negative text-indent prefix
column + how details inherits it. row taxonomy reflects current
state (notes split into .note / .note.stderr / .note.op; .sys is
amber; recv tool_results default-open with markdown body via
tool_use_id correlation; rich send/ask/answer renderers). new
sections for renderer dispatch flow, markdown integration,
fmtArgsGeneric extra-MCP fallback, dashboard msgrow text-indent
reset.

CLAUDE.md

@@ -77,19 +77,27 @@ hive-c0re/         host daemon + CLI (one binary, subcommand-dispatched)
   assets/               index.html, dashboard.css, app.js (include_str!)
 
 hive-fr0nt/           shared frontend-assets crate (browser only).
-  src/lib.rs            pub const BASE_CSS / TERMINAL_CSS / TERMINAL_JS
-                         re-exports; both binaries `include_str!` them
-                         and prepend to their per-page serving routes.
+  src/lib.rs            pub const BASE_CSS / TERMINAL_CSS / TERMINAL_JS /
+                         MARKED_JS re-exports; both binaries
+                         `include_str!` them and prepend to their per-
+                         page serving routes.
   assets/base.css       Catppuccin palette + body typography (one source
                          of truth, no per-page redeclaration).
   assets/terminal.css   `.terminal-wrap` + `.live` + `.tail-pill` +
                          `.row` / `details.row` styling for both
-                         pages' lit log panes.
+                         pages' lit log panes. Unified prefix-column
+                         (padding-left + negative text-indent) so glyph
+                         alignment is consistent across row kinds + a
+                         `.md` block scope for marked-rendered bodies.
   assets/terminal.js    `window.HiveTerminal.create(opts)`: scroll-
                          sticky log + "↓ N new" pill + history
                          backfill + SSE subscribe-buffer-snapshot-
                          dedupe dance. Pages register a kind→renderer
                          map; the terminal owns the lifecycle.
+  assets/marked.min.js  vendored marked v4.0.2 UMD bundle. Per-agent
+                         terminal uses the global `marked.parse` for
+                         markdown bodies on send / recv / ask / answer
+                         / assistant text rows.
 
 hive-ag3nt/        in-container harness crate; produces TWO binaries
   src/lib.rs            re-exports + DEFAULT_SOCKET, DEFAULT_WEB_PORT
@@ -141,7 +149,8 @@ read them à la carte.
   [`docs/web-ui.md`](docs/web-ui.md).
 - **"How does the per-agent terminal classify + colour
   events?"** → [`docs/terminal-rendering.md`](docs/terminal-rendering.md)
-  (taxonomy + known inconsistencies + a proposed coherence pass).
+  (as-built row taxonomy + layout contract + markdown +
+  extra-MCP fallback).
 - **"How does claude get its prompt and what tools does it have?"** →
   [`docs/turn-loop.md`](docs/turn-loop.md).
 - **"How do config changes flow from manager to operator to
@@ -174,31 +183,96 @@ read them à la carte.
 In-flight or recent context that hasn't earned a section yet.
 Prune freely.
 
-- **Just landed:** meta-flake overhaul. Each agent's applied
-  repo is a module-only flake (forwards every `inputs.*`
-  through to `agent.nix` as the `flakeInputs` module arg —
-  manager edits `inputs` to pull in external flakes like an
-  MCP server's own flake; the new sha lands in the agent's
-  own `flake.lock` and rolls up to meta's). A single
-  hive-c0re-owned repo at `/var/lib/hyperhive/meta/`
-  declares one input per agent and one
-  `nixosConfigurations.<n>` output, wrapping the agent's
-  `nixosModules.default` with identity + `HIVE_PORT` /
-  `HIVE_LABEL` / `HIVE_DASHBOARD_PORT` /
-  `HIVE_OPERATOR_PRONOUNS`. Containers run against
-  `meta#<n>`. Every approve uses two-phase staging
-  (prepare → build → finalize/abort) so meta's git log only
-  records successful deploys; failures + denials live as
-  annotated tags in applied. All meta operations
-  serialize behind a tokio mutex; stale `.git/index.lock`
-  is cleared on hive-c0re startup. Manager has `/applied`
-  + `/meta` RO-bound + the `applied` remote pre-wired in
-  every proposed repo. Migration runs idempotently on
-  startup (`HIVE_SKIP_META_MIGRATION=1` skips). Operator
-  pronouns are a NixOS module option
-  (`services.hive-c0re.operatorPronouns`, default
-  `"she/her"`); the harness substitutes them into the
-  system prompt at boot.
+- **Just landed:** ctx + cost badges split. The per-agent
+  page now shows TWO chips — `ctx · N` (last inference's
+  prompt size = actual context window utilisation, parsed
+  from each `assistant` event's `.message.usage`; the
+  number to watch for compaction) and `cost · M` (sum
+  across every inference in the turn, the previous
+  behaviour now correctly labelled — tool-heavy turns
+  rebill the cached prefix per call and blow past the
+  model's window). Both fed by a single
+  `TokenUsageChanged { ctx, cost }` SSE event at turn-end
+  via `Bus::record_turn_usage`. `turn_stats` grew four
+  `last_*_tokens` columns (idempotent ALTER migration) so
+  cold-load seeds both badges from the most recent row.
+  Pre-migration rows yield no `ctx` seed (empty badge
+  until next turn) rather than a misleading zero.
+- **Just landed:** per-agent terminal coherence pass.
+  Unified prefix column (padding-left + negative
+  text-indent so every row kind aligns); `<details>`
+  summaries drop the directional glyph and let CSS
+  `▸/▾` sit in the prefix column; turn boundaries
+  de-weighted (border-left rule only, no bold/margin/
+  tint); stderr lines render orange `!`,
+  operator-initiated notes mauve italic, catch-all `.sys`
+  escalated to orange so unrecognised stream-json
+  surfaces. Message-bearing tool calls
+  (`send`/`ask`/`answer`/`recv`) render default-open
+  with markdown bodies via vendored `marked` v4.0.2
+  (`hive-fr0nt::MARKED_JS`); assistant `text` rows also
+  markdown-rendered. Extra-MCP tools get a generic
+  args pretty-printer (`fmtArgsGeneric`) instead of
+  raw JSON. tool_use_id → name map carries through the
+  stream so `renderToolResult` knows when a result came
+  from `recv` and should default-open with markdown.
+  See `docs/terminal-rendering.md` for the as-built
+  taxonomy. Bonus: ctx badge seeded from `turn_stats`
+  on cold load via `Bus::seed_usage` so the chip paints
+  real numbers before the next turn finishes.
+- **Just landed:** `open_threads` → `loose_ends` rename
+  (more honest about what the list is) + new
+  `cancel_loose_end(kind, id)` MCP tool on both
+  surfaces. `kind = "question"` posts a `[cancelled by
+  <self>]` answer to unblock the asker; `kind =
+  "reminder"` hard-deletes before fire. Auth: sub-agent
+  must own the row (`asker == self` / `owner == self`);
+  manager bypasses for hive-wide cleanup. `LooseEnd`
+  enum gained a `Reminder { id, owner, message, due_at,
+  age_seconds }` variant; sub-agent flavour filters by
+  owner, manager unfiltered. Shared dispatch in
+  `hive-c0re/src/questions.rs::handle_cancel_loose_end`.
+  Per-agent web UI's `/api/open-threads` →
+  `/api/loose-ends`. Closes the agent-side "I have no
+  way to cancel what I queued" friction from the
+  ergonomics wishlist.
+- **Just landed:** `whoami` MCP tool on both surfaces —
+  returns `{ name, role, pronouns, hyperhive_rev }`.
+  Lets an agent self-identify without scraping its own
+  system prompt; pronouns are pulled from the
+  `HIVE_OPERATOR_PRONOUNS` env that the system prompt
+  also substitutes, so the two stay in sync.
+- **Just landed:** reminder delivery failures persist +
+  surface. The 5s scheduler now records the failure
+  reason on the `reminders` row instead of silently
+  dropping; the web UI surfaces them in the loose-ends
+  section so the owner agent can see "this reminder
+  never landed because the target was destroyed" without
+  reading journald.
+- **Just landed:** path linkify. The broker tags every
+  message body server-side with `file_refs` at ingest
+  via `/api/state-file/check` (validates each path,
+  attaches container→host resolution). Last segment
+  must look like `name.ext` so directory mentions don't
+  fire spurious links. Dashboard renders refs as
+  collapsible path-preview blocks below the message
+  body; per-agent terminal picks them up from the same
+  field. Server-side validation means the JS doesn't
+  re-walk allow-lists on every render.
+- **Just landed:** tombstones + meta_inputs as
+  `DashboardEvent`s. Closes the last two refetch loops
+  on the dashboard side — `purge-tombstone` and
+  `meta-update` POSTs now flip to 200 with
+  `data-no-refresh`. The 5s `/api/state` poll is gone
+  entirely; everything event-driven.
+- **Just landed:** per-agent UI gained an open-threads
+  section (questions + approvals + reminders pending
+  against this agent) + the container row on the
+  dashboard gained a `⏰ N` pending-reminder count
+  chip. task_started / task_notification stream-json
+  events now pretty-render in the terminal with the
+  `⌁` glyph so subagent (Task tool) activity is
+  visually distinct from main-session tool calls.
 - **Just landed:** per-agent extra MCP servers via the
   `hyperhive.extraMcpServers.<key>` NixOS option in
   `agent.nix`. Declares `{ command, args, env,