challenge-login

name	challenge-login
description	Use when the contestant needs to obtain or refresh their Simulation Challenge JWT (CHALLENGE_TOKEN), or wants to inspect the current logged-in user. Trigger words include "log in", "token", "401", "current user", "name", "refresh".

challenge-login — Acquire and refresh the JWT

The challenge API is gated by a JWT delivered as Authorization: Bearer <token>. Almost everything else fails with 401 until this is set.

Note: the challenge API uses email + password auth, NOT the Casdoor OAuth path used elsewhere on the platform.

Inputs

Variable	Required	Notes
BASE_URL	no	fixed default http://120.92.88.78 (override only if explicitly told)
EMAIL	for first login	contestant email
PASSWORD	for first login	contestant password
CHALLENGE_TOKEN	for refresh / current-user	existing JWT

If any are missing, ask before proceeding. Never print the password back to the user.

Step 1 — Login (read-only on the platform; safe to run)

When echoing this command back to the user, redact the password (show [REDACTED] or just its length). Never include the literal $PASSWORD value in your transcript or log output.

# Helper (define once per shell; or inline at the top of each Bash call)
challenge_save_var() {
  local f=~/.simubotix-challenge.env key="$1" val="$2"
  touch "$f" && chmod 600 "$f"
  if [ -s "$f" ]; then
    awk -v k="$key" '$0 !~ "^" k "="' "$f" > "$f.tmp" && mv "$f.tmp" "$f"
  fi
  printf '%s=%q\n' "$key" "$val" >> "$f"
  chmod 600 "$f"
  export "$key=$val"
}

LOGIN_RESP=$(curl -fsS -G "$BASE_URL/api/challenge/login" \
  --data-urlencode "email=$EMAIL" \
  --data-urlencode "password=$PASSWORD")

STATUS=$(echo "$LOGIN_RESP" | jq -r '.status // "error"')
TOKEN=$(echo  "$LOGIN_RESP" | jq -r '.token  // empty')

if [ "$STATUS" != "ok" ] || [ -z "$TOKEN" ] || [ "$TOKEN" = "null" ]; then
  echo "login failed: $LOGIN_RESP" >&2
  exit 1
fi

challenge_save_var CHALLENGE_TOKEN "$TOKEN"
echo "CHALLENGE_TOKEN persisted to ~/.simubotix-challenge.env (length=${#TOKEN})"

Always check .status == "ok" AND .token is non-null/non-empty before persisting — a malformed response would otherwise silently leave CHALLENGE_TOKEN=null on disk, breaking every later call with a confusing 401.

challenge_save_var writes CHALLENGE_TOKEN=<jwt> to ~/.simubotix-challenge.env (mode 0600) and exports it in the current shell. Subsequent Bash calls (even fresh subshells) recover it via . ~/.simubotix-challenge.env.

Anything other than {"status":"ok","token":"<JWT>"} → stop and report the body verbatim to the user.

Step 2 — Inspect the current user (recommended after login)

[ -f ~/.simubotix-challenge.env ] && . ~/.simubotix-challenge.env
curl -fsS "$BASE_URL/api/challenge/current-user-info" \
  -H "Authorization: Bearer $CHALLENGE_TOKEN" | jq

Read these fields back to the user:

• name — what shows up on the leaderboard.
• max_concurrent_cases (if exposed) — the per-user parallelism cap; remember this for challenge-run-agent.

If this returns HTTP 5xx (e.g. curl: (22) ... error 500), do NOT assume the platform is down. The most common cause is $CHALLENGE_TOKEN being unset / empty / not exported into the current shell — the server may surface that as a 500 instead of a clean 401. Drop -f to see the body, and confirm the state file is being sourced:

[ -f ~/.simubotix-challenge.env ] && . ~/.simubotix-challenge.env
echo "token length=${#CHALLENGE_TOKEN}"   # 0 → still missing; re-run Step 1
curl -sS -i "$BASE_URL/api/challenge/current-user-info" \
  -H "Authorization: Bearer $CHALLENGE_TOKEN" | tail -15

Only treat the 5xx as a real platform issue after the token is confirmed valid (e.g. login itself just succeeded with the same value).

Step 3 — Refresh an expired token

/login/refresh works even when the JWT has expired, as long as it can still be parsed. Once it's truly malformed, fall back to Step 1.

Confirm before running. Refresh is read-only on the platform but mutates the user's shell $CHALLENGE_TOKEN — that's a side effect they should approve. Print the command, name the consequence, and wait for "yes". Exception: if the user has already said "just refresh" / "auto-refresh on 401", treat that as standing consent.

[ -f ~/.simubotix-challenge.env ] && . ~/.simubotix-challenge.env

REFRESH_RESP=$(curl -fsS "$BASE_URL/api/challenge/login/refresh" \
  -H "Authorization: Bearer $CHALLENGE_TOKEN")
NEW=$(echo "$REFRESH_RESP" | jq -r '.token // empty')

if [ -z "$NEW" ] || [ "$NEW" = "null" ]; then
  echo "refresh failed: $REFRESH_RESP" >&2
  echo "fall back to Step 1 (email + password)" >&2
else
  challenge_save_var CHALLENGE_TOKEN "$NEW"   # rewrites ~/.simubotix-challenge.env
  echo "refreshed (length=${#NEW})"
fi

If refresh returns null (token unparseable, account disabled, etc.), do NOT loop — go to Step 1 and ask the user for EMAIL / PASSWORD if they aren't in the environment.

Failure modes

Symptom	Action
curl exits non-zero / HTTP 4xx	Show the response body. Do NOT retry blindly.
.token is null / empty	Auth credentials wrong; ask the user to verify; never auto-retry with guesses.
Subsequent calls still return 401	Token may be for a different BASE_URL. Confirm the host.

Resetting state

The state file ~/.simubotix-challenge.env is not auto-cleaned. To reset:

# Forget everything (forces a fresh login + submit-job)
rm -f ~/.simubotix-challenge.env

# Or: keep token, drop only job vars (e.g. before working on a different job)
challenge_reset_job() {
  local f=~/.simubotix-challenge.env
  [ -f "$f" ] || return 0
  awk '$0 !~ /^(JOB_ID|JOB_UUID|PARALLELISM|TUNNEL_ENDPOINT)=/' "$f" > "$f.tmp" && mv "$f.tmp" "$f"
  chmod 600 "$f"
  unset JOB_ID JOB_UUID PARALLELISM TUNNEL_ENDPOINT
}

Use challenge_reset_job when the user wants a clean slate before challenge-submit-job and the previous job's JOB_ID is no longer needed (or already terminal).

Hand-off

After login, suggest the next skill based on the user's stated goal:

• "I want to submit a model" → challenge-submit-job
• "I want to know my rank" → challenge-ranking
• "Just checking my account" → done.

Do NOT proceed automatically; wait for the user to confirm.