typewriter/docs/roadmap.md

Roadmap — version details

Frequent releases. Each version is a usable artifact, not a checkpoint. This file holds the macro-plan (Macroplan block below) and the per-version scope. The user-facing requirements and engineering targets each release feeds into are tracked in qfd.md.

Status — synced 2026-07-11

The editor core has been built 2–3 versions ahead of the device releases, and is now extracted into a host-testable editor crate (plus a display crate for the panel framebuffer) so cargo test exercises it off the xtensa target. v0.1 shipped 2026-07-11 (late against the 2026-06-29 baseline): SD storage, save, and git publish are all wired into the app binary and hardware-verified (:sync commits on the SD /sd/repo and pushes to a test repo), and the boot splash (Spike 9) is confirmed on the panel — a vector typoena-in-a-circle shown at startup while the SD mounts, then the editor comes up. Cold boot verified at 4258 ms (power-on → cursor, 2026-07-11; 742 ms under the ≤ 5 s gate). It first measured ~5.5 s; the fix was to bring the editor up with a full-area partial (~630 ms) instead of a second full refresh (~1.9 s) — panel confirmed clean, no ghosting. The 1-hour soak is attested from real use; the remaining post-ship acceptance checks are power-pull recovery, 1000-word no-drop, and Ctrl-G's not-yet-built pull-then-retry (→ v0.9). Beyond v0.1, v0.2 navigation, v0.2.5 international input (hardware-verified 2026-07-11), and most of v0.6 Markdown already run. Version numbers are unchanged — they track shippable device releases, not core progress.

Marks: [x] done in core · [~] partially done · [ ] not started. An inline (✓) marks the done half of a split item.

Macro-plan

Macroplan source — paste into the macroplan app to render the week-by-week view. original dates are the June 2026 baseline and never move; slips get appended as reestimates, per-item actuals live in the Status block above.

title = "Typoena — macro plan"

[[feature]]
name = "v0.1 it writes, it pushes"
start = 2026-06-01
original = 2026-06-29
delivered = 2026-07-11
learning = "Shipped 12 days late. The long pole was hardware bring-up risk, not the editor: SD on a shared SPI bus (resolved by moving it to its own SPI3, ADR-012) and on-device git (gix killed, pivoted to libgit2 as an esp-idf CMake component, ADR-004). Splash landed as a vector wordmark, not the planned 1-bit bitmap — the asset-embed/blit path is deferred to v1.0."

[[feature]]
name = "v0.2 navigation"
start = 2026-06-29
original = 2026-07-20
status = "on-track"
note = "Core work landed early: motions and modes already run; Ctrl-d/u and the UTF-8 buffer landed 2026-07-11; only the line-number gutter remains."

[[feature]]
name = "v0.2.5 international input"
start = 2026-07-20
original = 2026-08-03
status = "on-track"
note = "Done early + hardware-verified 2026-07-11: dead-key accent composer in the keymap crate, editor buffer made UTF-8-correct. Side-panel pending marker dropped by decision (stale before the ~630 ms panel repaint)."

[[feature]]
name = "v0.3 editing"
start = 2026-08-03
original = 2026-08-24
status = "on-track"
note = "Deletes, counts, and operator grammar done early in core; yank/paste, undo/redo remain."

[[feature]]
name = "v0.4 visual + ex"
start = 2026-08-24
original = 2026-09-07
status = "on-track"
note = ": command-line mechanism and :fmt done early; Visual mode not started."

[[feature]]
name = "v0.5 palette + multi-file"
start = 2026-09-07
original = 2026-09-28
note = "Also adds the git-tracked .typoena.toml preferences file (save_on_idle, auto_sync cadence) and the palette `>` command mode that edits it live."

[[feature]]
name = "v0.6 markdown"
start = 2026-09-28
original = 2026-10-12
status = "on-track"
note = "Render affordances done early; 80-col ruler + snippet engine (added 2026-07-08) remain."

[[feature]]
name = "v0.7 search + git"
start = 2026-10-12
original = 2026-11-02

[[feature]]
name = "v0.8 battery + sleep"
start = 2026-11-02
original = 2026-11-30

[[feature]]
name = "v0.9 robustness"
start = 2026-11-30
original = 2026-12-28

[[feature]]
name = "v1.0 polish"
start = 2026-12-28
original = 2027-01-25

[[milestone]]
name = "MVP ships"
week = 2026-06-29
requires = ["v0.1 it writes, it pushes"]

---

v0.1 — MVP: "it writes, it pushes" — [x]

The minimum thing that justifies the hardware existing. Full design: product · technical.

Status: SHIPPED 2026-07-11 (late vs the 2026-06-29 baseline). Core editing + partial refresh run on device; SD mount + save are wired into main.rs (Spike 3 resolved — a genuine ≤32 GB card mounts, verified on its own SPI3 host per ADR-012); git publish is wired (:sync → commit + fast-forward push on the SD /sd/repo, hardware-verified against a test repo); and the boot splash (Spike 9) is confirmed on the panel — Frame::splash shows a vector typoena-in-a-circle at startup while the SD mounts, then the editor comes up. Cold boot verified at 4258 ms (power-on → cursor, 2026-07-11; 742 ms under the ≤ 5 s gate). It first measured ~5.5 s; the fix was to bring the editor up with a full-area partial (~630 ms) instead of a second full refresh (~1.9 s) — panel confirmed clean. The 1-hour soak is attested from real use; the remaining post-ship acceptance checks are power-pull recovery, 1000-word no-drop, and Ctrl-G pull-then-retry (→ v0.9) — see product → acceptance.

• ESP32-S3 boots (✓); e-ink shows Typoena splash (✓ Spike 9, confirmed on panel 2026-07-11); boot status surfaces via the panel snackbar (no serial on device)
• USB host enumerates the Nuphy, key events reach the editor (Spike 4)
• One hard-coded file (/sd/repo/notes.md) opens on boot — wired in main.rs (boot_storage mounts the SD and loads the note; a missing card / repo / unreadable note halts with a panel message). The card is pre-seeded from a computer (just init copies a full clone to /sd/repo + writes config), never cold-cloned on device — see note.
• Insert-only editing, backspace, enter, arrow keys — modal editor overshot this early (see v0.2)
• Line wrap, no line numbers yet — soft-wrap done early (see v0.6)
• Save to SD via :w (and :sync) — wired in main.rs through the persistence module's atomic write (unlink-then-rename + *.tmp boot-recovery)
• [~] Wi-Fi credentials + remote URL + PAT + author: today baked into the binary via env!() (no NVS, no on-device provisioning UI in v0.1). Migrating to /sd/typoena.conf on the card, provisioned by just provision (or just init for a fresh card) from the same firmware/.env the build uses (minimum input — rotate the PAT or switch networks without a reflash, no card re-copy). Firmware to read it at boot instead of env!() — the git-publish wiring landed with baked config (2026-07-11); the typoena.conf migration itself is deferred to v0.9 (on-device provisioning).
• Publish on :sync (the editor's command; the roadmap originally planned Ctrl-G): stage notes.md → commit with a timestamp message → fast-forward push; on a rejected push, fetch + reconcile then retry once (no-op short-circuit when the tree is unchanged). Wired into the editor and hardware-verified 2026-07-11 — firmware::git_sync opens the SD /sd/repo, runs on a dedicated 96 KB git thread with lazy Wi-Fi, and pushes over mbedTLS HTTPS+PAT; the panel snackbar shows synced <oid> / up to date / sync failed. (Interrupted-push auto-retry deferred to v0.9.)
• Split the display into a writing column (60 cols) + a side panel (~30 cols at FONT_6X10) for metadata — the surface every later panel feature writes to. Built in the editor crate (draw_panel): a full-height divider at x=600, with the panel currently showing the word count, the mode indicator, a NO-KBD flag, and a transient save/publish snackbar (below). Later fields (filename, clock, Wi-Fi, battery) add to the same surface. Defined in CONTEXT.md § Screen regions and product § Screen layout.
• Snackbar — a transient side-panel notice for host events (added 2026-07-11). On-device there is no serial log, so boot posts loaded <name> (the note's filename without suffix), :w posts saved / save FAILED - retry :w, and :sync posts syncing... then the push result (synced <oid> / up to date / sync failed). Set via Editor::set_notice; cleared on the next keystroke rather than a timer — a timed auto-dismiss would cost a ~630 ms full-area e-ink flash purely to erase text, which the panel deliberately avoids (cf. the dropped pending-accent marker in v0.2.5).
• Partial refresh on edits (✓ Spike 5); save wired (full-area partial repaint on :w)

Out of scope: Vim, palette, multiple files, branches, conflict handling.

v0.2 — Vim navigation — [~]

Status: navigation done in core; the UTF-8-correct buffer landed 2026-07-11 (hardware-verified) and Ctrl-d/u half-page scroll landed 2026-07-11 (host-tested). Remaining = the line-number gutter. Shipped early beyond scope: a read-only View mode and the full d/c operator + text-object grammar (see v0.3 / v0.4).

• Mode state machine (Normal / Insert / View), mode indicator in the status strip
• Movement: h j k l, w b e, 0 $, gg G, Ctrl-d Ctrl-u. Ctrl-d/u step display (soft-wrapped) rows, not logical lines — half a page is half the visible window however prose wraps; decoded as HalfPageDown/Up intents in the keymap, caret moves and the viewport follows.
• i a o O A to enter Insert
• Esc returns to Normal
• Line numbers in the left gutter: absolute — Spike 13 first. Relative numbering was dropped (2026-07-11): renumbering the whole gutter on every j/k burns the e-ink ghosting budget for no proportionate gain, whereas absolute renumbers only the rows below an edit.
• Groundwork — UTF-8-correct buffer: caret motions and edits step by character, not byte (dropped the ASCII == byte-offset assumption), so every motion stays correct with accented input. Done 2026-07-11 alongside extracting the editor into a host-testable crate — char-step motions/deletes, byte-vs-char split in layout/caret_rc, word_end/de fixed; 15 host tests. Render font is ISO-8859-15 (Latin-9), so accented glyphs display.

v0.2.5 — International input — [x]

Status: DONE in core, hardware-verified 2026-07-11 (typed ç é è ñ on the bench, no crash). US-International dead-key accent composition lives in the keymap crate — a Composer downstream of the decoder — wired into usb_kbd.rs so the editor still receives a single Key::Char. Builds on the v0.2 UTF-8-correct buffer and the ISO-8859-15 render font. Host-tested.

• Dead keys — grave, acute, circumflex, diaeresis, tilde — compose with the next letter: à é ê ë ñ, ç (via '+c), both cases
• '+space emits a literal apostrophe (the everyday apostrophe path); a dead key followed by a non-composing letter emits the accent then the letter
• A non-character event (Enter, Backspace, arrows) flushes any pending accent as its literal first
• Pending-accent indicator in the side-panel status strip — DROPPED (2026-07-11 decision): at typing speed it would be stale before the ~630 ms panel repaint, so it conveys nothing. Left unbuilt on purpose.
• Bonus (2026-07-11): the physical Esc key (HID 0x29) now types `/~ — Esc comes from the Caps tap — so grave/tilde accents and Markdown code fences are reachable on a 60% board without a Fn layer.

v0.3 — Vim editing — [~]

Status: deletes and counts done; yank/paste, undo/redo, and . repeat remain — there is no register or recorded-op mechanism yet. The d/c operator grammar and text objects landed here ahead of schedule (the roadmap had scheduled only dd/dw/d$).

• [~] x dd, dw dd d$ (✓); yy p P and repeat with . remain (need a register / recorded op)
• Undo / redo (u, Ctrl-r) — bounded history in PSRAM
• Numeric prefixes (3dd, 5j)
• Ahead of schedule: c change operator + text objects (ciw, di(, ca", … — inner/around, nesting-aware)

v0.4 — Visual mode + ex commands — [~]

Status: the : command-line mechanism is built (Command mode + status-strip echo), but only :fmt exists — :w :q :wq :e remain. Visual mode is not started.

DECISION (2026-07-07): v/V = Visual selection (vim-standard). The read-only View (reading/scroll) mode currently bound to v/V moves off those keys and gets its own trigger (exact key TBD when Visual lands). View mode stays — it just frees v/V for Visual.

• Visual char (v) and line (V) modes, y d c on selections
• [~] : command line: :w :q :wq :e <path> (mechanism ✓; these commands remain)
• Ahead of schedule / unscheduled: :fmt Markdown formatter (table alignment, blank-line collapse, trailing-whitespace strip)

v0.5 — File palette + multi-file — [ ]

Status: not started (Spikes 11 + 14 retire the panel-mechanism and buffer-lifecycle risk first).

• Ctrl-P opens fuzzy file palette over both /sd/repo/ and /sd/local/, with a scope marker (e.g. [git] / [local]) per result
• Open, switch, close buffers (keep ≤ 3 in memory)
• :e and palette share the same recent-files list
• :enew creates a new file — prompts for scope (tracked vs local)
• Delete a file — removes it from the SD card; for a Tracked file the removal reaches the next Ctrl-G Publish's staged set (git rm / add -A semantics, not plain git add .); a Local file is just unlinked
• Ctrl-G is disabled / hidden when the current buffer is local-scope
• The side panel briefly shows file count on Ctrl-G when the publish bundles more than one dirty Tracked file (e.g. "publishing 3 files: abc1234"), so workspace-scoped behaviour stays visible to the user
• Preferences file /sd/repo/.typoena.toml — a git-tracked, hand-editable TOML file for editor behaviour, deliberately distinct from the /sd/typoena.conf card secrets (Wi-Fi / PAT / remote / author, gitignored, never committed — see v0.1). Read at boot; a missing file or key falls back to the defaults below. Keys:
  • save_on_idle (bool, default true) — auto-save the current buffer on the existing idle pause (the ≥ 1 s typing-pause the panel already uses for its refresh), so :w becomes optional rather than required.
  • auto_sync (duration string, default "10m"; "0" / omitted disables; min clamp ~"2m" so a palette typo can't drain the battery) — a max-staleness cap, not a wall-clock timer: opportunistic, rate-limited Publish. Push when already awake + dirty (coalesced into the idle-pause, ≤ once per auto_sync) and once on the way into sleep if dirty; never wake from deep sleep purely to sync. Wi-Fi energy is a 1/T curve whose knee sits at 5–10 min, and save_on_idle already owns local data safety — so 10 min halves the sync energy of a 5-min default for no real risk. Full derivation: tradeoff-curves/wifi-auto-sync.md. The schema + defaults live here in v0.5; the periodic side rides the better-git work (v0.7) and must interact with light / deep sleep (v0.8).
  • Open question: because the file is committed, these prefs sync to every device that clones the repo — a per-device sync cadence may instead want a card-local override (in typoena.conf). Decide before build.
• Palette command mode — typing > at the Ctrl-P palette switches it from file search to a command list (VS Code-style). The v0.5 commands edit the .typoena.toml prefs above — e.g. > save on idle: on/off and > auto sync: 10m — writing the value back to the file and applying it live. This command list is the discoverable surface that later actions (:fmt, theme, font) also register into.

v0.6 — Markdown affordances — [~]

Status: render affordances done early; the 80-col ruler and the snippet engine remain (snippets are net-new scope, added 2026-07-08).

• Heading lines bolded in render (faux-bold double-strike)
• List continuation on Enter inside - / 1. (with empty-item exit)
• Soft-wrap at word boundaries
• Optional column ruler at 80
• Snippets — trigger-driven text expansion for Markdown authoring (Zed-inspired, but no completion popup: e-ink's ~630 ms refresh rules out a live filtering menu, and it fights the distraction-free premise). Shape, mirroring the existing list_marker insert-transform:
  • Tab in Insert mode triggers expansion: if the word immediately before the caret matches a snippet prefix, expand it; otherwise insert spaces as today (expand_snippet(word) -> Option<(body, stops)>, alongside list_marker).
  • A snippet body is literal text plus numbered empty tab stops $1 … $n and a final $0. There is no placeholder text (${1:label}) — the editor has no selection/overtype model, so a placeholder would just be text to delete. There are no dynamic or computed values either (e.g. no date — there's no RTC; the wall clock is valid only after Wi-Fi+SNTP, so it'd stamp 1970 on a cold boot).
  • After expansion the caret lands on $1; Tab advances to the next stop, forward only (no Shift-Tab). Stored stop offsets shift with edits at the caret (all pending stops are always after it). The session auto-aborts on Esc, a mode change, or a motion that leaves the stops.
  • On a typing pause (same throttle as the insert cursor / word-count refresh — the panel never repaints per keystroke), if the word before the caret is a snippet prefix, the side panel shows the hint (the target expansion). Quiet while typing; the hint appears on pause.
  • The snippet table is hard-coded in the binary to start; a git-syncable file on SD (/sd/repo/.snippets) is a later option, deferred while SD is still blocked.
  • Starter set: link [$1]($2)$0, image ![$1]($2)$0, fenced code block, etc.

v0.7 — Search + better git — [ ]

Status: not started.

• / forward search, n N
• :Gpull (fetch + fast-forward only; refuse on conflict and surface it)

v0.8 — Power: battery + sleep — [ ]

• Measure idle / typing / push current draw on bench
• 18650 + IP5306 charge board, soft power switch
• Light sleep on idle > 30 s (keyboard interrupt wakes)
• Deep sleep on lid close (reed switch); restore cursor + buffer
• Battery indicator in the side panel

v0.9 — Robustness — [ ]

• Crash-safe writes (write to .tmp, fsync, rename)
• Recover from interrupted push (re-attempt on next save)
• SD card removal / reinsert handling
• Wi-Fi reconnect with backoff
• On-device provisioning + settings screen: SSID, PAT rotation, default remote, commit author (replaces the v0.1 dev-only NVS-flashing path — first release usable by someone who is not the firmware author)

v1.0 — Polish — [ ]

• Boot time ≤ 3 s to usable cursor — currently ~4.26 s; the ~1.9 s cold-boot full refresh is a hard e-ink floor, so ≤ 3 s is marginal (see notes/boot-time-budget.md)
• Font selection (at least one serif + one mono) with adjustable font size, switchable at runtime and persisted across reboots
• Theme: light / dark (inverted e-ink), switchable at runtime and persisted across reboots
• Enclosure design files in hardware/
• User guide

v1.x — Stretch / nice-to-have

• 10.3" panel upgrade via IT8951
• Multiple remotes / repos
• Stats: words today, streak
• BLE-HID fallback for wireless keyboards