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N3/P7: a party that only fights together twice

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Adds -party N / -party-classes to expedition-sim. Followers are seated
through the real !expedition invite / !expedition accept pair, so the
harness measures the tier gate, the busy guard and the supply pooling
rather than a roster hand-built to succeed. A follower who is refused
halts the run: a party reading taken from a walk that was secretly solo
is worse than no reading.

It immediately found what it was built to find. Only elite and boss
doorways seat the roster; exploration rooms, patrols and harvest
interrupts all resolve through SimulateCombat against ctx.Sender, and
P6d made the walk commands leader-only. So on a 38-room T5 expedition
the party fights 2-3 rooms together and the leader solos the rest -
then dies alone, tearing down the run rows only they own.

Measured at L15/16 over dragons_lair + abyss_portal, party of 3, n=15
per cell: zero TPKs and zero member deaths across 240 seats. Every
failure is the leader falling while two untouched members stand at full
HP. Fighter clears 100% (solo: 47-67%), cleric 33-53% (solo: 13-47%).
The band is unreadable until inline combat seats the party, so the C1
contingency - +35% monster HP per member - stays on the shelf; it would
punish the trash the leader already fights alone.

Hence the outcome vocabulary grows a third word. "tpk" used to mean any
run-ending event, which is how a leader dying beside a healthy party
stayed invisible through P5 and P6. Now: tpk (roster dead),
leader_down, fled (run over, leader alive) - read off the death flag,
not off HP, which the close-out leaves anywhere. A one-seat roster
makes leader-dead and all-dead the same predicate, so solo keeps its
labels for a real death.

Two bugs found in review before this landed:

  - An unknown class was not an error anywhere: -class fightr built a
    1-HP character and reported an ordinary outcome for it. Guarded in
    BuildCharacter, not the flag parser, since the leader had the bug
    long before parties did.
  - The roster short-rest healed the dead - handleDnDShortRest does not
    gate on the death flag, so a member killed in a won boss fight got
    rested back above 0 and stopped counting as a casualty.

Golden byte-identical; go test ./... green.
This commit is contained in:
prosolis
2026-07-10 00:37:59 -07:00
parent a063e0ccd0
commit 32e3148755
5 changed files with 453 additions and 22 deletions
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85
cmd/expedition-sim/main.go
View File

@@ -6,6 +6,10 @@
// expedition-sim [-class fighter] [-level 5] [-zone goblin_warrens]
// [-bank 1000] [-cap 50] [-log] [-data DIR]
//
// Party run (N3/P7 — the leader is -class; followers clone it unless named):
// expedition-sim -party 3 -level 15 -zone dragons_lair
// expedition-sim -party 2 -class cleric -party-classes fighter -level 16 ...
//
// Matrix mode (cartesian sweep over classes × levels × zones × N runs,
// one JSON object per stdout line, log suppressed by default):
// expedition-sim -matrix -classes fighter,mage -levels 5,10 \
@@ -51,6 +55,9 @@ func main() {
petLevel = flag.Int("pet-level", 0, "attach a base housing pet at this level (1-10) to every sim character; 0 = no pet (default, matches prod char-creation)")
party = flag.Int("party", 1, "seat a party of N (1 = solo, the historical path). Followers are invited on Day 1 and buy their own supplies")
partyClasses = flag.String("party-classes", "", "comma-separated classes for the N-1 followers (default: clones of -class)")
jobs = flag.Int("jobs", 0, "matrix mode — concurrent worker count (each worker is a subprocess so it gets its own sqlite). 0 = runtime.NumCPU()")
)
flag.Parse()
@@ -58,6 +65,10 @@ func main() {
if *petLevel < 0 || *petLevel > 10 {
fail("pet-level must be 0-10, got", *petLevel)
}
if *party < 1 || *party > plugin.ExpeditionPartyMax {
fail("party must be 1-", plugin.ExpeditionPartyMax, ", got", *party)
}
followers := followerClasses(*class, *party, *partyClasses)
plugin.SetSimIncludeTrace(*trace)
plugin.SetSimPetLevel(*petLevel)
@@ -72,14 +83,40 @@ func main() {
includeLog = *logFlag
}
})
runMatrix(*classes, *levels, *zones, *runs, *bank, *cap, *days, includeLog, *jobs, *trace, *petLevel)
runMatrix(*classes, *levels, *zones, *runs, *bank, *cap, *days, includeLog, *jobs, *trace, *petLevel, *party, *partyClasses)
return
}
runSingle(*class, *level, *zone, *userTag, *dataDir, *bank, *cap, *days, *logFlag)
runSingle(*class, *level, *zone, *userTag, *dataDir, *bank, *cap, *days, *logFlag, followers)
}
func runSingle(class string, level int, zone, userTag, dataDir string, bank float64, cap, days int, includeLog bool) {
// followerClasses expands -party / -party-classes into the class of each
// follower seat. An explicit list must name every seat: a party of 3 whose
// second follower silently defaulted to the leader's class would quietly
// answer a different question than the one asked.
func followerClasses(leaderClass string, party int, spec string) []string {
n := party - 1
if n == 0 {
if strings.TrimSpace(spec) != "" {
fail("-party-classes given but -party is 1")
}
return nil
}
if strings.TrimSpace(spec) == "" {
out := make([]string, n)
for i := range out {
out[i] = leaderClass
}
return out
}
out := splitNonEmpty(spec)
if len(out) != n {
fail(fmt.Sprintf("-party %d needs %d follower classes, got %d", party, n, len(out)))
}
return out
}
func runSingle(class string, level int, zone, userTag, dataDir string, bank float64, cap, days int, includeLog bool, followers []string) {
dir := dataDir
if dir == "" {
var err error
@@ -90,7 +127,7 @@ func runSingle(class string, level int, zone, userTag, dataDir string, bank floa
defer os.RemoveAll(dir)
}
res, err := runOne(dir, id.UserID(userTag), plugin.DnDClass(class), level, plugin.ZoneID(zone), bank, cap, days)
res, err := runOne(dir, id.UserID(userTag), plugin.DnDClass(class), level, plugin.ZoneID(zone), bank, cap, days, followers)
if err != nil {
if res != nil {
if !includeLog {
@@ -117,7 +154,7 @@ type matrixJob struct {
rep int
}
func runMatrix(classes, levels, zones string, runs int, bank float64, cap, days int, includeLog bool, jobs int, trace bool, petLevel int) {
func runMatrix(classes, levels, zones string, runs int, bank float64, cap, days int, includeLog bool, jobs int, trace bool, petLevel, party int, partyClasses string) {
cs := splitNonEmpty(classes)
ls := parseLevels(levels)
zs := splitNonEmpty(zones)
@@ -148,7 +185,7 @@ func runMatrix(classes, levels, zones string, runs int, bank float64, cap, days
var wg sync.WaitGroup
for i := 0; i < jobs; i++ {
wg.Add(1)
go matrixWorker(exe, workCh, resCh, &wg, bank, cap, days, includeLog, trace, petLevel)
go matrixWorker(exe, workCh, resCh, &wg, bank, cap, days, includeLog, trace, petLevel, party, partyClasses)
}
go func() {
for _, j := range work {
@@ -167,7 +204,7 @@ func runMatrix(classes, levels, zones string, runs int, bank float64, cap, days
}
}
func matrixWorker(exe string, in <-chan matrixJob, out chan<- *plugin.SimResult, wg *sync.WaitGroup, bank float64, cap, days int, includeLog, trace bool, petLevel int) {
func matrixWorker(exe string, in <-chan matrixJob, out chan<- *plugin.SimResult, wg *sync.WaitGroup, bank float64, cap, days int, includeLog, trace bool, petLevel, party int, partyClasses string) {
defer wg.Done()
for j := range in {
uid := fmt.Sprintf("@sim:%s-l%d-%s-%d", j.class, j.level, j.zone, j.rep)
@@ -187,6 +224,11 @@ func matrixWorker(exe string, in <-chan matrixJob, out chan<- *plugin.SimResult,
"-user", uid,
fmt.Sprintf("-log=%t", includeLog),
fmt.Sprintf("-pet-level=%d", petLevel),
fmt.Sprintf("-party=%d", party),
}
// Left empty, each cell's followers clone that cell's own -class.
if partyClasses != "" {
args = append(args, "-party-classes", partyClasses)
}
if trace {
args = append(args, "-trace")
@@ -228,7 +270,7 @@ func matrixWorker(exe string, in <-chan matrixJob, out chan<- *plugin.SimResult,
}
func runOne(dataDir string, uid id.UserID, class plugin.DnDClass, level int, zone plugin.ZoneID, bank float64, cap, days int) (*plugin.SimResult, error) {
func runOne(dataDir string, uid id.UserID, class plugin.DnDClass, level int, zone plugin.ZoneID, bank float64, cap, days int, followers []string) (*plugin.SimResult, error) {
runner, err := plugin.NewSimRunner(dataDir)
if err != nil {
return nil, fmt.Errorf("init runner: %w", err)
@@ -239,7 +281,32 @@ func runOne(dataDir string, uid id.UserID, class plugin.DnDClass, level int, zon
return nil, fmt.Errorf("build character: %w", err)
}
runner.Euro.Credit(uid, bank, "expedition-sim bankroll")
return runner.RunExpedition(uid, zone, cap, days)
// Followers share the leader's level — a party is not a carry (the tier
// gate refuses an under-levelled invitee anyway) — and each buys their own
// loadout, so each needs their own bankroll.
var members []id.UserID
for i, fc := range followers {
muid := followerUserID(uid, i)
if _, err := runner.BuildCharacter(muid, plugin.DnDClass(fc), level); err != nil {
return nil, fmt.Errorf("build follower %d (%s): %w", i+1, fc, err)
}
runner.Euro.Credit(muid, bank, "expedition-sim bankroll")
members = append(members, muid)
}
return runner.RunPartyExpedition(uid, members, zone, cap, days)
}
// followerUserID derives a follower's Matrix id from the leader's. It must keep
// the ":" — ResolveUser treats a colon as "this is already a full mxid" and
// short-circuits the room-membership lookup the sim has no client for.
func followerUserID(leader id.UserID, i int) id.UserID {
s := string(leader)
local, server, ok := strings.Cut(strings.TrimPrefix(s, "@"), ":")
if !ok {
local, server = strings.TrimPrefix(s, "@"), "sim"
}
return id.UserID(fmt.Sprintf("@%s-m%d:%s", local, i+1, server))
}
func emitIndented(res *plugin.SimResult) {