git.giacomolli.uk - onechat/blob - probe.go

   1 package main
   2
   3 import (
   4         "bufio"
   5         "context"
   6         "encoding/json"
   7         "errors"
   8         "fmt"
   9         "io"
  10         "log"
  11         "os"
  12         "path/filepath"
  13         "strconv"
  14         "time"
  15 )
  16
  17 const (
  18         // probeName is the agent name of a probe run. The cache key comes from
  19         // it.
  20         probeName = "Probe"
  21 )
  22
  23 // probe runs "onechat probe LOG COUNT [BUILDS]". It appends the first COUNT
  24 // messages of LOG, one JSON object {kind, text} per line, to a new chat in
  25 // probe/ in the data directory, and builds its tree with the real compactor.
  26 // Before each user message it waits for the builds, as a turn does. It stops at
  27 // the first failed call, after buildCallLimit calls, or when the used percent
  28 // of a quota window grows by more than buildQuotaLimit points. At the end it
  29 // reports the calls, the time per call, the calls at once, the cached share,
  30 // the quota, the retries, and the line sizes. BUILDS, from 1 to buildMax,
  31 // limits the builds that call the model at once in this run only. The core
  32 // still queues up to buildMax builds. The run holds the lock of the token file,
  33 // so it does not run while the daemon runs.
  34 func probe(ctx context.Context, args []string, out io.Writer) (err error) {
  35         if len(args) != 2 && len(args) != 3 {
  36                 return errors.New("usage: onechat probe LOG COUNT [BUILDS]")
  37         }
  38
  39         count, err := strconv.Atoi(args[1])
  40         if err != nil {
  41                 return fmt.Errorf("parse probe count: %w", err)
  42         }
  43
  44         if count <= 0 {
  45                 return fmt.Errorf("COUNT %q is not a positive number", args[1])
  46         }
  47
  48         builds := buildMax
  49         if len(args) == 3 {
  50                 builds, err = strconv.Atoi(args[2])
  51                 if err != nil {
  52                         return fmt.Errorf("parse probe builds: %w", err)
  53                 }
  54
  55                 if builds < 1 || builds > buildMax {
  56                         return fmt.Errorf("BUILDS %q is not a number from 1 to %d", args[2], buildMax)
  57                 }
  58         }
  59
  60         entries, err := probeReadLog(args[0], count)
  61         if err != nil {
  62                 return fmt.Errorf("read probe input: %w", err)
  63         }
  64
  65         dir, err := dataDir()
  66         if err != nil {
  67                 return fmt.Errorf("find probe data directory: %w", err)
  68         }
  69
  70         config, err := loadConfig(dir)
  71         if err != nil {
  72                 return fmt.Errorf("load probe configuration: %w", err)
  73         }
  74
  75         tokens, err := lockTokens(dir)
  76         if err != nil {
  77                 return fmt.Errorf("lock probe tokens: %w", err)
  78         }
  79
  80         defer func() {
  81                 closeErr := tokens.Close()
  82                 if closeErr != nil {
  83                         err = errors.Join(err, fmt.Errorf("close probe token lock: %w", closeErr))
  84                 }
  85         }()
  86
  87         address, auth, err := modelEndpoint(config, dir)
  88         if err != nil {
  89                 return fmt.Errorf("select probe endpoint: %w", err)
  90         }
  91
  92         root := filepath.Join(dir, "probe", time.Now().Format("20060102-150405"))
  93         err = os.MkdirAll(root, 0o700)
  94         if err != nil {
  95                 return fmt.Errorf("create probe directory: %w", err)
  96         }
  97
  98         usagePath := filepath.Join(root, "usage.jsonl")
  99         client := newModelClient(address, auth, "onechat-"+probeName, usagePath)
 100         client.LimitCalls(buildCallLimit)
 101
 102         summarizer := ProbeSlotSummarizer{
 103                 inner: newCompactor(client, probePrompt, config.Compactor),
 104                 slots: make(chan struct{}, builds),
 105         }
 106
 107         // The report of the probe counts the failed calls, so the lines of the
 108         // failed builds are not needed.
 109         memory, err := openMemory(ctx, root, time.Now, summarizer, log.New(io.Discard, "", 0))
 110         if err != nil {
 111                 return fmt.Errorf("open probe memory: %w", err)
 112         }
 113
 114         _, err = fmt.Fprintf(out, "probe: %d messages into %s with %s at %s effort, %d builds at once\n", len(entries), root, config.Compactor.Model, config.Compactor.Effort, builds)
 115         if err != nil {
 116                 return fmt.Errorf("write probe header: %w", errors.Join(err, memory.Close()))
 117         }
 118
 119         run := BuildRun{
 120                 memory:    memory,
 121                 client:    client,
 122                 usagePath: usagePath,
 123         }
 124
 125         appended, stop := run.Run(ctx, entries)
 126         sizes, err := memory.buildModelLines()
 127         err = errors.Join(err, memory.Close())
 128         if err != nil {
 129                 return fmt.Errorf("finish probe memory: %w", err)
 130         }
 131
 132         records, err := buildReadUsage(usagePath)
 133         if err != nil {
 134                 return fmt.Errorf("read probe usage: %w", err)
 135         }
 136
 137         err = buildWriteReport(out, appended, stop, records, sizes)
 138         if err != nil {
 139                 return fmt.Errorf("write probe report: %w", err)
 140         }
 141
 142         return nil
 143 }
 144
 145 // ProbeSlotSummarizer lets at most cap(slots) builds call inner at once. A
 146 // build past the limit waits for a slot.
 147 type ProbeSlotSummarizer struct {
 148         inner Summarizer
 149         slots chan struct{}
 150 }
 151
 152 // Summarize waits for a slot and builds the node with inner.
 153 func (s ProbeSlotSummarizer) Summarize(ctx context.Context, task Task) (string, error) {
 154         select {
 155         case s.slots <- struct{}{}:
 156         case <-ctx.Done():
 157                 return "", ctx.Err()
 158         }
 159
 160         defer func() {
 161                 <-s.slots
 162         }()
 163
 164         return s.inner.Summarize(ctx, task)
 165 }
 166
 167 // probeReadLog reads the first count messages of the probe log at path. Source
 168 // dates are ignored because a probe uses its own clock.
 169 func probeReadLog(path string, count int) (entries []DatedMessage, err error) {
 170         file, err := os.Open(path)
 171         if err != nil {
 172                 return nil, fmt.Errorf("open probe log: %w", err)
 173         }
 174
 175         defer func() {
 176                 closeErr := file.Close()
 177                 if closeErr != nil {
 178                         err = errors.Join(err, fmt.Errorf("close probe log: %w", closeErr))
 179                 }
 180         }()
 181
 182         scanner := bufio.NewScanner(file)
 183         scanner.Buffer(make([]byte, 64*1024), buildLineBytes)
 184
 185         for len(entries) < count && scanner.Scan() {
 186                 var entry DatedMessage
 187
 188                 err = json.Unmarshal(scanner.Bytes(), &entry)
 189                 if err != nil {
 190                         return nil, fmt.Errorf("probe log line %d: %w", len(entries)+1, err)
 191                 }
 192
 193                 entry.Date = ""
 194                 entries = append(entries, entry)
 195         }
 196
 197         err = scanner.Err()
 198         if err != nil {
 199                 return nil, fmt.Errorf("read probe log: %w", err)
 200         }
 201
 202         if len(entries) < count {
 203                 return nil, fmt.Errorf("probe log has %d messages, fewer than %d", len(entries), count)
 204         }
 205
 206         return entries, nil
 207 }
 208
 209 // probePrompt returns the system prompt of a probe run: the prompt of the agent
 210 // probeName, without instructions and with a fixed instructions file path.
 211 func probePrompt() (string, error) {
 212         return prompt(probeName, "/PROBE/instructions.md", ""), nil
 213 }