What the console reads, and how each screen degrades

The console reads only hammunition <verb> --json (the JSON interface). Every read runs in a worker thread. A document whose schema is not hammunition/1 is refused by name. There is no version floor: the console is part of the engine, so the engine field is shown and never compared. A read that fails shows the engine's own message and is never retried silently.

Engine prerequisites: E1 is per-profile members, installed and installed_size_bytes on each profile of hammunition list; E2 is hammunition update reporting retired units as rows with exit 0 (engine issue 239). Both are treated as present; each screen that reads them shows "unknown" when they are not.

Screen	Reads	Fields used	When a field or document is missing
Home	hammunition status	target, engine	the header says ?
Home	hammunition doctor	fails, warns, healthy, checks[].name/status/detail/fix	the counts say ?; fix is shown, never run
Home	hammunition station show	callsign, grid_square (only whether each is set)	"Station: unknown - (the engine's words)" on the screen; the header says station ?
Home	hammunition logs	runs[0]	"Last run: no runs yet" for an empty list, "Last run: unknown" when runs is not a list
Home	hammunition update	counts.behind_pin, rows in state retired	without E2 the engine refuses with exit 2: "unknown (the engine's words)"
Home	hammunition list	the starter profile's members, installed (E1)	the checklist's install steps show [?]
Install	hammunition list	profiles: name, stage, summary, consent_gated, packages, documentation, E1 fields; units: name, status, summary, resolves_here	without E1: "N units, state unknown"
Install	hammunition install NAMES --dry-run, hammunition uninstall NAMES --dry-run	the whole plan: every section of InstallPlanView and RemovalPlanView, blockers	a refused plan shows its blockers and offers no run
Station	hammunition station show	every station field	an unset field says "not set"
Station	hammunition maps regions FILTER, hammunition reference books	regions; books[].id/title/licence	the chooser shows the engine's error
Secrets	hammunition secrets status	doppler.*, secrets[].name/purpose/available/source/detail/unit/command/get_url/get_how (never a value: the engine has none to give)	the screen shows the engine's error
Repeaters	hammunition maps repeaters list	layers[].id/area/active/day/rows/personal_use/unverified, skipped[], credits; for a lookup rows[].callsign/output_hz/offset_hz/tone/mode/distance_km/bearing_deg/place, centre.source, within_km, merged	the screen shows the engine's error
Repeaters	hammunition maps areas	active_areas, unloaded, areas[].area/kind/active/layers/size_bytes/day	the screen shows the engine's error
Repeaters, Secrets	hammunition update repeaterbook-client	the row for the unit: state (not installed or not). list --json carries no per-unit installed state	the fetch is offered anyway, and the engine refuses by name if the unit is missing
Logs	hammunition logs	directory, runs[].path/started/command/result/exit_code/size	"No runs yet." A path outside directory is never opened
Update	hammunition update [NAMES] [--upstream]	counts, rows, lists_note, upgrade_command, rebuild_command, upstream	without E2: the refusal is shown and a per-profile list is offered
Help	hammunition list, hammunition show PROFILE	documentation.*, consent.disclosure, suggests_one_of	the engine's error is shown

Writes (never read as JSON): hammunition install|uninstall NAMES, hammunition station set --FLAG=VALUE, hammunition maps repeaters fetch-repeaterbook --state STATE [--county NAME] (with a session secret in its environment, never its argv), hammunition maps repeaters import FILE, hammunition maps repeaters remove --layer ID, hammunition maps activate AREA...|--all|--none, hammunition hardware apply, and the apt upgrade command the update report prints (run without apt's assume-yes, so apt asks). All of them run in a terminal pane.

hammunition services, hammunition artifacts, hammunition maps phone and the other documents the engine publishes are not read in this release.